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Number Operations

SequencesLessonsMaterialsVideos
  1. Math

Number Operations

SequencesLessonsMaterialsVideos
SequencesLessonsMaterialsVideos

Counting sequences, place value systems, and the four mathematical operations across whole numbers and decimals. Builds proficiency in solving equations, identifying numerical patterns, and applying properties of operations to multi-digit arithmetic.

MathNumbers & CountingCounting ObjectsNumber NamesComparing NumbersNumber OperationsCounting SequenceNumbers 0-10Place Value Understanding and SystemAdd and Subtract Within 20Addition and Subtraction ConceptsAddition and Subtraction EquationsAddition and Subtraction ProblemsFoundations for MultiplicationMultiplication and Division PropertiesMultiply and Divide Within 100Multiplication and Division ProblemsFactors and MultiplesProperties of OperationsPatterns and RelationshipsGenerate and Analyze PatternsMulti-Digit ArithmeticPlace Value OperationsMulti-Digit and Decimal OperationsNumerical ExpressionsFour Operations and PatternsFour Operations Problem SolvingMeasurement & DataMeasurable AttributesMeasuring LengthsMeasure and Estimate Lengths in Standard UnitsRelate Addition and Subtraction to LengthClassifying and Counting ObjectsTime and MoneyArea Concepts and MeasurementPerimeter and Area MeasuresAngle Concepts and MeasurementTime, Volume, and MassMeasurement Unit ConversionsGeometryIdentifying ShapesShapes and AttributesShape Attributes and ReasoningShapes and CompositionClassifying 2D FiguresGeometric Figures and RelationshipsLines, Angles, and ShapesAngle, Area, and VolumeGeometric MeasurementVolume of 3D ShapesCoordinate Plane ApplicationsTransformations in the PlaneCongruence and SimilarityUnderstand congruence in terms of rigid motionsSimilarity and TransformationsProve Theorems Involving SimilarityPythagorean TheoremTrigonometry for General TrianglesMake Geometric ConstructionsProve Geometric TheoremsTheorems About CirclesFind Arc Lengths And Areas of Sectors of CirclesVolume FormulasRelationships Between Two-Dimensional and Three-Dimensional ObjectsProve Simple Geometric Theorems AlgebraicallyTranslate Between Geometric Description and Equation for Conic SectionApply Geometric Concepts in Modeling SituationsFractions & DecimalsFractions as NumbersBuilding FractionsFraction Equivalence and OrderingAdding and Subtracting FractionsMultiplying and Dividing FractionsDividing FractionsDecimal FractionsMulti-Digit Computation and FactorsAdd, Subtract, Multiply, and Divide Rational NumbersRational Number SystemIrrational Numbers and ApproximationsRatiosRatios and ProportionsProportional RelationshipsUnit RateAlgebraAlgebraic ExpressionsGenerate Equivalent ExpressionsQuantitative RelationshipsProportional Relationships and Linear EquationsEquations and InequalitiesEquation Solving and ReasoningLinear Equations and SystemsGraph Equations and InequalitiesSystems of EquationsReal-World Algebraic ProblemsQuantitative Reasoning with UnitsExpression StructureEquivalent Expression FormsRadicals and Integer ExponentsRational ExponentsRational and Irrational NumbersPolynomial OperationsPolynomial IdentitiesPolynomial Zeros and FactorsRational ExpressionsComplex Number OperationsComplex Numbers in PolynomialsComplex Numbers on PlaneStatistics & ProbabilityRepresent and Interpret DataData DistributionsStatistical VariabilityProbability ModelsCompound Event ProbabilitiesStatistical SamplingInterpret Categorical and Quantitative DataBivariate Data PatternsInterpret Linear ModelsComparing Two PopulationsRandom Processes in StatisticsIndependence and Conditional ProbabilityExpected ValuesProbability-Based Decision MakingStatistical Inference and ConclusionsFunctionsFunction Concepts and NotationDefine and Compare FunctionsInterpret Functions in ContextAnalyze Function RepresentationsModel Relationships with FunctionsIdentify Linear vs Exponential GrowthDistinguish Between Function TypesCompare Growth RatesInterpret Function ExpressionsBuild Functions from RelationshipsConstruct and Model FunctionsTransform and Combine FunctionsModel Comparison and SelectionSolve Exponential EquationsTrigonometryTrigonometric Ratios Involving Right TrianglesTrigonometric Functions and Unit CircleModel with Trigonometric FunctionsTrigonometric IdentitiesVectors & MatricesIntroduction to Vectors and MatricesVector QuantitiesVector OperationsMatrix OperationsCalculusLimits and ContinuityDerivative Concepts and NotationDerivative Rules and TechniquesApplications of DerivativesOptimization ProblemsRelated RatesCurve Sketching and AnalysisIntegration Concepts and NotationAntiderivatives and Indefinite IntegralsDefinite Integrals and AreaFundamental Theorem of CalculusIntegration TechniquesApplications of IntegrationDifferential EquationsSequences and SeriesParametric and Polar FunctionsVector-Valued Functions
Counting SequenceSequential number naming and cardinal counting principles for early learners. Develops fluency in forward and backward sequences while introducing skip-counting patterns.
Numbers 0-10Numeral recognition, counting, and cardinality for integers zero through ten. Strengthens one-to-one correspondence and basic number sense through visual sets and tracing.
Addition and Subtraction ConceptsMental math strategies, regrouping techniques, and the inverse relationship between operations. Builds computational fluency through visual models, number lines, and real-world word problems.
Patterns and RelationshipsIdentification, extension, and creation of repeating and growing patterns using shapes, colors, and numbers. Develops algebraic thinking by analyzing sequences and defining functional relationships between variables.
Video
Learning to Multiply by 3 with Groups and Skip Counting

Learning to Multiply by 3 with Groups and Skip Counting

This instructional video provides a clear, step-by-step introduction to multiplying by 3, designed specifically for early elementary students. It begins by using concrete visual aids—groups of balloons and connecting cubes—to demonstrate the concept of multiplication as repeated addition. The narrator guides viewers through the process of counting groups, identifying how many items are in each group, and then skip-counting by threes to find the total sum. The video progresses from concrete examples to abstract representation. It explicitly links the language of "groups of" to the multiplication symbol, showing how "4 threes" translates mathematically to "4 x 3". Following the object-based examples, the video features a number line segment where numbers appear sequentially to practice skip-counting from 3 to 30. This visual reinforces the number pattern associated with the 3 times table. Finally, the video presents the complete multiplication table of 3, reading through each equation from 1 x 3 to 10 x 3. This structure makes the video an excellent resource for introducing the concept of multiplication, reinforcing skip-counting skills, and aiding in the memorization of multiplication facts. Teachers can use it to visualize the transition from addition to multiplication or as a review tool for times table fluency.

MatholiaChannelMatholiaChannel

3mins 1s

Video
Counting Strategies for Circles and Rows

Counting Strategies for Circles and Rows

A focused mathematics tutorial that demonstrates strategies for counting objects arranged in different patterns, specifically circles, scattered groups, and arrays. The narrator guides viewers through four distinct counting exercises involving animated dogs, mice, and cookies, modeling the thought process required to count accurately without making common errors. The video specifically emphasizes the concept of "one-to-one correspondence" and strategies to avoid double-counting, particularly when objects are arranged in a continuous circle. By explicitly marking a starting point mentally and stopping before overlapping, the narrator models critical metacognitive strategies for early learners. This resource is highly valuable for early childhood classrooms as a direct instruction tool or intervention for students struggling with counting accuracy. It moves from simple circular arrangements (numbers 5-10) to more complex arrays involving teen numbers (up to 19), providing a scaffolded approach to learning cardinality.

Khan AcademyKhan Academy

1min 44s

Video
Fast-Paced Counting by Ones: 1 to 50

Fast-Paced Counting by Ones: 1 to 50

This high-energy animated video challenges early learners to practice counting by ones from 1 to 50 at a brisk pace. Labeled as an "Expert" level song, it features a fast, electronic beat designed to build fluency and automaticity in number sequencing. The video engages students visually and auditorily, moving beyond simple slow enumeration to rapid number recall. The visual theme is set on a bright, sunny farm. The video alternates between two main animated sequences: a boy performing jumping jacks during the musical interludes, and a sheep jumping over a fence as the counting occurs. Numbers from 1 through 50 appear clearly inside the sun at the top of the screen, synchronizing with the spoken count to reinforce number recognition alongside the auditory cues. Teachers can use this video as an effective "brain break" or warm-up activity in Math class. The rhythmic nature invites physical participation, allowing students to jump or clap along with the beat while practicing their numbers. It is particularly useful for assessing student fluency and helping them transition from counting slowly on fingers to reciting number sequences confidently and quickly.

Have Fun TeachingHave Fun Teaching

2mins 30s

Video
Learning to Skip Count by Tens to 100

Learning to Skip Count by Tens to 100

This energetic animated math video teaches early learners how to skip count by tens up to 100. Set to an upbeat rhythm, the video uses bright visuals and a clear numerical display to guide students through the sequence 10, 20, 30, and so on. A friendly character stands alongside a digital display that flashes each number as it is sung, reinforcing the connection between the spoken word and the written numeral. Themes in this video center on foundational number sense, specifically the base-ten number system and pattern recognition. By isolating the multiples of ten, students can focus on the rhythmic pattern of counting (

Have Fun TeachingHave Fun Teaching

2mins 56s

Video
Mastering Skip Counting by 10s, 100s, and 1,000s

Mastering Skip Counting by 10s, 100s, and 1,000s

This video serves as a clear, step-by-step instructional guide on the mathematical concept of 'Counting On' using place value strategies. It transitions from concrete visual aids using Base-10 blocks to abstract number sequences, demonstrating how to skip count by 10s, 100s, and 1,000s with 3-digit and 4-digit numbers. The core themes explore number sense, pattern recognition within the decimal system, and the specific mechanics of 'bridging' or crossing place value thresholds (e.g., transitioning from 190 to 200). The video systematically isolates changing digits to help students visualize how adding specific quantities affects only certain place values, except when a regrouping occurs. For educators, this video is an excellent tool for visual learners who struggle to understand how place value works with larger numbers. It effectively scaffolds learning by starting with physical representations before moving to symbolic numbers, making it perfect for introducing skip counting, reinforcing mental math strategies, or supporting remediation for students struggling with multi-digit addition.

MatholiaChannelMatholiaChannel

2mins 52s

Video
How to Skip Count by Tens to 100

How to Skip Count by Tens to 100

This animated math video introduces young learners to the concept of skip counting by tens through three distinct visual models: real-world grouping, a number line, and a hundred chart. The video begins by using cartons of eggs to demonstrate how grouping items into sets of ten allows for faster counting than counting by ones. It then transitions to abstract representations, showing how to jump by tens on a number line and identifying the vertical pattern created when counting by tens on a 1-100 number grid. Key themes include number sense, recognizing patterns in the base-ten number system, and efficient counting strategies. The video explicitly connects visual quantities (groups of eggs) to linear measurement (number line) and symbolic patterns (hundred chart), helping students bridge concrete and abstract mathematical understanding. For educators, this video serves as an excellent introduction or review of skip counting. The clear visuals support diverse learning styles, and the concluding question—asking students to predict the pattern if starting from the number 2—provides a natural springboard for critical thinking and extending the lesson into off-decade skip counting (e.g., 12, 22, 32).

MatholiaChannelMatholiaChannel

2mins

Video
Counting by 5s Starting from 179

Counting by 5s Starting from 179

This educational video demonstrates how to skip count by 5s starting from a challenging three-digit number, specifically 179. Unlike standard skip counting that often begins at zero or five, this tutorial guides viewers through the process of adding 5 repeatedly to an arbitrary starting number. The narrator models mental math strategies, explicitly showing how to break down the number 5 into smaller parts (1 and 4) to bridge across decades and hundreds boundaries (e.g., getting from 179 to 180, then to 184). The video explores key themes of arithmetic patterns and number sense. It highlights the repeating pattern in the ones digit when adding 5s (in this case, alternating between 9 and 4). The visual demonstration of handwriting the addition process helps reinforce the concept of regrouping and "making a ten" to simplify mental calculations, rather than relying solely on rote memorization. For educators, this resource is excellent for moving students beyond basic skip counting into more complex number sense application. It is particularly useful for teaching the "bridge to ten" strategy for addition. Teachers can use this video to transition students from simple counting patterns to understanding the underlying addition mechanics of skip counting, helping to build fluency with three-digit numbers and mental addition.

Khan AcademyKhan Academy

2mins 4s

Video
Learning to Count by Tens to 100

Learning to Count by Tens to 100

This educational video introduces early learners to the concept of skip counting by tens up to 100 using a relatable visual aid: boxes of crayons. The video systematically demonstrates how groups of ten accumulate to form larger numbers, starting from 50 and progressing sequentially to 100. Through clear narration and visual tracking, it reinforces the relationship between the number of "tens" (e.g., 6 tens) and the total quantity (e.g., 60). Key themes include skip counting, the base-ten number system, and the foundational concept of place value. The video explicitly connects verbal counting (10, 20, 30...) with written equations (e.g., "5 tens = 50"), bridging the gap between concrete objects and abstract mathematical notation. The repetitive structure is designed to build confidence and pattern recognition in young mathematicians. For educators, this video serves as an excellent visual model for introducing or reinforcing counting by tens. It can be used as a hook for math lessons on place value or as a guided practice tool where students chant along with the narrator. The clear visual representation of "groups of ten" provides a strong scaffolding for later concepts like multiplication and division, making it a versatile resource for Kindergarten and First Grade classrooms.

MatholiaChannelMatholiaChannel

4mins 19s

Video
Skip Counting by Threes to Sixty

Skip Counting by Threes to Sixty

A high-energy, animated musical video that teaches students how to skip count by threes. Set against a backdrop of outer space, a dog character pilots a rocket ship that accelerates as the counting progresses. The video uses a catchy song to reinforce the pattern of multiples of three, starting with a slow introduction and gradually increasing in speed and range. The content focuses on the mathematical skill of skip counting, which serves as a foundational concept for understanding multiplication and division. It breaks the learning process into three distinct stages: first counting slowly to 15, then increasing the range to 30, and finally challenging students to count all the way to 60. Visual numbers appear on screen synchronized with the audio to support dual coding and memory retention. This video is an excellent classroom resource for introducing or reviewing multiplication tables for the number 3. Its repetitive structure allows for choral response, making it perfect for whole-group instruction or warm-up activities. The engaging animation and musical rhythm help students memorize the number sequence through pattern recognition and auditory cues, turning rote memorization into a fun, interactive experience.

Scratch GardenScratch Garden

2mins 6s

Video
Visualizing Place Value: Counting to 10,000

Visualizing Place Value: Counting to 10,000

This educational video provides a clear, visual demonstration of counting up to 10,000 using the Singapore Math concrete-pictorial-abstract approach. It utilizes digital representations of Base 10 blocks (hundreds flats and thousands cubes) to illustrate the concepts of skip counting by 100s, 1,000s, and 10s. The video explicitly bridges the gap between visual models and abstract numbers, helping students understand the magnitude of numbers and the structure of the base-ten number system. The content moves systematically from basic skip counting (100 to 1,000; 1,000 to 10,000) to more complex tasks involving starting from arbitrary large numbers (e.g., counting by 10s starting at 6,320). It specifically highlights critical transition points, such as moving from 900 to 1,000 and 9,000 to 10,000, reinforcing the terminology and value of these larger place value units. For teachers, this video is an excellent tool for introducing or reinforcing place value and skip counting in 3rd and 4th grade. The visual nature of the stacking blocks helps students mentally organize large quantities, while the clear narration models correct mathematical language. It addresses the common student struggle of determining which digit changes during skip counting and offers visual proof of why numbers 'roll over' at the thousands place.

MatholiaChannelMatholiaChannel

3mins 41s

Video
How to Count Forward by 10s, 100s, and 1000s

How to Count Forward by 10s, 100s, and 1000s

This educational video from Matholia provides a clear, step-by-step demonstration of counting on by 10s, 100s, and 1000s using four-digit numbers. Through the use of animated number lines, the video visually represents the concept of skip counting, showing how adding specific values affects the digits in a number. It breaks the process down into three distinct sections, allowing learners to focus on one place value change at a time.

MatholiaChannelMatholiaChannel

2mins 50s

Video
Learning to Tell Time by 5-Minute Intervals

Learning to Tell Time by 5-Minute Intervals

This educational video provides a clear, step-by-step demonstration of telling time in 5-minute intervals using an analog clock. Starting at 2:00, the video incrementally advances the minute hand by five minutes at a time, completing a full hour rotation until the clock reaches 3:00. A narrator systematically guides viewers through each change, reinforcing both the visual position of the hands and the corresponding digital time notation. Themes of measurement, skip counting, and timekeeping are central to this resource. The video explicitly connects the movement of the minute hand to counting by fives, using a visual highlight—a pink shaded sector—to represent the elapsed time. This visual aid helps bridge the gap between abstract numbers and the physical space time occupies on a clock face. It also introduces alternative phrasing for specific times, such as "half past two" for 2:30. For educators, this video serves as an excellent tool for introducing or reviewing clock reading skills in early elementary classrooms. The predictable pattern allows for choral response and active participation, where students can predict the next time before it is revealed. The dual presentation of analog hands and digital numbers supports learners in connecting these two common time formats, while the visualization of elapsed time lays early groundwork for understanding duration and fractions.

MatholiaChannelMatholiaChannel

3mins 10s

Video
Mastering Skip Counting by 7 Through Visual Models

Mastering Skip Counting by 7 Through Visual Models

This educational math video provides a comprehensive visual guide to skip counting by 7 and learning the 7 times table. Through a sequence of engaging animations, the video breaks down the concept into three distinct learning phases: an introductory rocket launch sequence that establishes the pattern, a conceptual demonstration using sets of pencils to explain multiplication as repeated groups, and a drill-and-practice section for building fluency. The content utilizes clear visual models to bridge the gap between skip counting and multiplication. By visualizing 'sets' of 7 pencils, students can see the concrete value behind abstract numbers like 14, 21, and 28. The video progresses from slow, conceptual building to rapid-fire recitation, helping students move from understanding the 'why' to mastering the 'how' of multiplication fluency. Ideally suited for elementary math instruction, this resource serves as both an introduction to the 7s family of facts and a review tool. The tiered structure—moving from visual models to abstract numbers, and finally to a self-checking quiz—allows teachers to use different segments for different instructional purposes, such as introducing the concept, practicing fluency, or assessing student retention.

Sheena DoriaSheena Doria

3mins 26s

Video
Learning to Count From 10 to 20

Learning to Count From 10 to 20

This educational video introduces early learners to the concept of "counting on" from ten to determine quantities between 11 and 20. Through clear, animated examples using familiar objects like colored pencils and buttons, the video demonstrates that it is more efficient to start counting from a known group of ten rather than counting every individual item starting at one. The narration guides viewers through the process of identifying a group of ten and then continuing the count (e.g., "10, 11, 12, 13") to find the total. The video explores key themes of early numeracy, specifically place value foundations and counting strategies. It visually represents numbers 11 through 20 as composed of "one ten" and "some ones," utilizing tools like bundles (pencil boxes) and ten-frames. It explicitly addresses the number 20 as being composed of "two tens," helping students transition from simple counting to understanding the base-ten structure of our number system. The video also covers recognizing the written numeral and the written word for the number 20. For classroom application, this video is an excellent resource for transitioning students from one-to-one correspondence counting to more advanced counting strategies. It provides a visual anchor for the "counting on" method, which is a critical developmental milestone in mathematical fluency. Teachers can use the built-in practice questions at the end of the video as a formative assessment tool, pausing before the answer is revealed to allow students to practice the skill in real-time. The clear visuals of ten-frames and grouped objects support learners in visualizing the composition of teen numbers.

MatholiaChannelMatholiaChannel

2mins 36s

Video
Finding Missing Numbers in Patterns

Finding Missing Numbers in Patterns

This educational video introduces primary students to the concept of number patterns and sequences using a clear, visual approach. Through a series of animated examples involving colorful balloons, the video demonstrates how to identify the "rule" of a pattern—such as adding 1, adding 2, subtracting 1, or subtracting 2—to determine missing numbers in a sequence. The content progresses from simple ascending sequences to descending ones, providing a comprehensive introduction to algebraic thinking. The video explores key mathematical themes including skip counting, addition and subtraction strategies, and logical reasoning. It emphasizes the importance of checking the relationship between adjacent numbers to establish a consistent pattern before trying to solve for unknowns. The visual cues, such as arrows indicating the operation between steps, help scaffold the learning process for visual learners. For educators, this video serves as an excellent instructional tool for math centers or whole-group introductions to patterning. It supports the development of early algebraic skills by asking students to analyze numerical relationships rather than just perform calculations. The clear pacing allows for natural pauses where teachers can ask students to predict the next number, making it highly interactive and suitable for 1st and 2nd-grade math curriculums.

MatholiaChannelMatholiaChannel

2mins 41s

Video
Mastering Skip Counting by 20s to 500

Mastering Skip Counting by 20s to 500

This engaging animated music video teaches students how to skip count by 20s, extending the sequence all the way to 500. Set against a whimsical outer space backdrop, the video features astronaut cats and a rocket-piloting worm who guide viewers through three increasing rounds of counting. The song introduces a helpful mental math strategy—relating counting by 20s to counting by 2s—making the concept accessible and memorable. The video explores themes of number patterns, place value, and the relationship between single-digit multiplication and tens. It visually reinforces the auditory counting with clear, large numbers appearing on screen, synchronized with the beat. The narrative arc builds in complexity, starting with a simple count to 100, then 200, and finally a rapid-fire challenge to 500, encouraging fluency. For educators, this resource is an excellent tool for math warm-ups, transitioning between lessons, or reinforcing place value concepts. It supports the development of number sense and prepares students for more complex multiplication and division tasks. The catchy melody and repetitive structure allow for active participation, making it suitable for whole-class singing and movement activities.

Scratch GardenScratch Garden

2mins 39s

Video
Counting Groups of Ten and Ones to 50

Counting Groups of Ten and Ones to 50

This educational video provides a clear, step-by-step demonstration of how to count collections of objects up to 50 using place value strategies. Instead of counting by ones, the video models the more efficient method of counting groups of ten first (skip counting), followed by counting on the remaining single units. This visual approach reinforces the concept of base-ten number systems. The video is structured around six distinct examples using common items like marbles, cubes, cookies, and strawberries. For each example, objects are arranged in clear rows of ten to facilitate visual grouping. The narrator counts the tens ("10, 20..."), adds the ones ("and 1 is 21"), and then explicitly demonstrates how to write both the numerical digit and the number word (e.g., "twenty-one") in cursive script. For educators, this resource is an excellent tool for introducing or reinforcing place value, two-digit number formation, and connecting numerals to number words. It effectively bridges the gap between concrete visual representations (objects) and abstract numerical symbols, making it ideal for early primary math lessons on counting, cardinality, and number sense.

MatholiaChannelMatholiaChannel

3mins 1s

Video
Counting Odd Numbers to 101 in Space

Counting Odd Numbers to 101 in Space

This energetic, music-based educational video teaches students how to identify and count odd numbers from 1 to 101. Using a catchy rock song and a space-themed animation, the video takes viewers on a journey aboard a rocket ship piloted by a dog. It begins by defining what an odd number is and providing a simple strategy for finding them: starting at one and jumping two numbers at a time. The content is structured to build confidence progressively. It starts with a short counting sequence from 1 to 11, moves to a slightly longer sequence up to 21, and culminates in a 'challenge round' counting all the way to 101. Visual cues clearly display the numbers as they are sung, helping to reinforce number recognition and sequential ordering. For educators, this video serves as an excellent tool for introducing or reviewing number sense, specifically distinguishing between odd and even numbers and practicing skip counting. The rhythmic nature of the song aids in memorization, while the visual of the ascending rocket provides a concrete metaphor for increasing values. It is particularly useful for active learning sessions where students can count along or move to the beat.

Scratch GardenScratch Garden

3mins

Video
Counting Objects from 11 to 20

Counting Objects from 11 to 20

This educational video provides a structured and repetitive guide for young learners to master counting numbers from 11 to 20. Using a clear, consistent format, the video introduces each number individually by presenting a set of objects. It utilizes the 'counting on' strategy, where a group of ten items is visually grouped and acknowledged first, followed by counting the additional items to reach the target number. This approach effectively introduces the concept of place value (ten and ones) without explicitly naming it yet. The video covers numbers 11 through 20 sequentially, using distinct visual themes for each number, such as cookies, ants, shells, and butterflies. Each segment follows the same pattern: a question asks "How many... are there?", the counting occurs, the total is stated in a full sentence, and finally, the numeral and its written word form are animated on screen. This multimodal approach supports different learning styles by combining auditory counting, visual grouping, and literacy reinforcement. For educators, this resource is an excellent tool for introducing teen numbers and the 'counting on' method. It helps students transition from counting by ones to understanding numbers as compositions of tens and ones. The clear audio and slow pacing make it suitable for choral counting in the classroom, while the written words support early reading skills. The video concludes with a summary chart counting from 11 to 20, serving as a perfect review or assessment tool.

MatholiaChannelMatholiaChannel

5mins 46s

Video
Discovering Patterns While Counting to 100

Discovering Patterns While Counting to 100

This video presents a visual and logical method for writing numbers from 0 to 100, focusing on identifying the inherent patterns within the base-10 number system. Rather than simply reciting numbers, the narrator builds a 100 chart row by row, demonstrating how the "ones" digits (0-9) repeat in every row while the "tens" digit increments. This approach transforms rote counting into a structural understanding of how numbers are formed. The content highlights key mathematical themes such as place value, counting sequences, and pattern recognition. By using color-coding—keeping the ones digit yellow while changing the color of the tens digit for each row—the video visually reinforces the concept that two-digit numbers are composed of tens and ones (e.g., 14 is demonstrated as 10 plus 4). The narrator explicitly breaks down the meaning of the digits, showing that the leading digit represents groups of ten. For educators, this resource is an excellent tool for introducing or reinforcing the 100 chart in early elementary classrooms. It moves beyond simple memorization to conceptual understanding, making it valuable for lessons on place value and number sense. Teachers can use this video to spark discussions about what patterns students see vertically (columns ending in the same number) and horizontally, or to demonstrate why our number system works the way it does.

Khan AcademyKhan Academy

4mins 58s

Video
Mastering Number Bonds of 7 with Cubes

Mastering Number Bonds of 7 with Cubes

This instructional video guides early learners through the concept of "number bonds" for the number 7, effectively demonstrating the part-part-whole relationship in addition. Using concrete manipulatives (colored linking cubes) alongside an abstract visual model (number bond diagram), the video systematically explores different pairs of numbers that sum to seven. The clear, uncluttered presentation allows students to focus entirely on the mathematical relationships being demonstrated.

MatholiaChannelMatholiaChannel

2mins 24s

Video
Solving Simple Subtraction Word Problems

Solving Simple Subtraction Word Problems

This educational video introduces young learners to the concept of subtraction through simple, visual word problems. Using engaging animations, the video presents two distinct scenarios: a farm setting with sheep and a playful scene with bubbles. In each story, the narrator guides students through the process of identifying the total number, recognizing the amount being subtracted, and calculating the remainder using number bonds and subtraction equations. The video explores key mathematical themes including basic subtraction, part-whole relationships (number bonds), and translating word problems into numerical equations. It specifically focuses on single-digit subtraction within the range of 1-10, making it highly accessible for early numeracy development. The use of the phrase "take" alongside the minus symbol helps bridge the gap between spoken language and mathematical notation. For educators, this resource serves as an excellent visual aid to reinforce subtraction skills. It demonstrates how to visualize a math problem using concrete objects before moving to abstract numbers. Teachers can use this video to model how to extract relevant information from a story problem, how to use number bonds as a solving strategy, and how to write the corresponding subtraction sentence. It is particularly effective for visual learners and for introducing the concept of "taking away."

MatholiaChannelMatholiaChannel

1min 1s

Video
Finding the Missing Number to Make 10 with Bananas

Finding the Missing Number to Make 10 with Bananas

This educational math video demonstrates how to solve a missing addend problem using concrete visual aids. Specifically, it tackles the equation "3 + _ = 10" by using drawings of bananas to represent the numbers. The narrator guides viewers through a "counting on" strategy, starting with the initial three bananas and drawing additional ones one-by-one until the total reaches ten. The video explores key themes of addition, equality, and the relationship between numbers that sum to ten (often called "friends of ten"). It visually distinguishes between the starting quantity and the added quantity, helping students understand that the missing number represents only the items added to reach the total, not the total itself. For educators, this video is an excellent tool for introducing or reinforcing algebraic thinking in early elementary grades. It bridges the gap between concrete counting and abstract equations. Teachers can use it to model how to use manipulatives to solve for unknown numbers, validating strategies like counting on or using drawing to solve math problems.

Khan AcademyKhan Academy

2mins

Video
Deciding When to Add or Subtract Using Fruit

Deciding When to Add or Subtract Using Fruit

This video explores the fundamental difference between addition and subtraction through a simple, visual example involving fruit. The narrator presents a scenario with five blueberries and three cherries, challenging viewers to determine whether they need to add or subtract to find the "total number of fruit." The video clearly distinguishes between the two operations by visually mapping them to physical actions—combining sets versus taking items away. Key themes include counting objects, understanding mathematical symbols (+ and -), and interpreting word problem vocabulary. The video visually demonstrates that addition is used for combining distinct groups to find a larger total sum (5 + 3 = 8), while subtraction is modeled as "taking away" or removing items from a starting group (5 - 3 = 2). This side-by-side comparison helps clarify when to apply each operation. For educators, this resource is an excellent tool for introducing early arithmetic concepts and problem-solving strategies. It helps students transition from concrete counting to abstract equations by explicitly visualizing the "why" behind the choice of operation. The clear comparison between "getting more" (addition) and "eating/taking away" (subtraction) provides a strong mental model for young learners beginning to solve one-step word problems.

Khan AcademyKhan Academy

2mins 17s

Video
How to Read and Interpret a Picture Graph

How to Read and Interpret a Picture Graph

This educational video provides a clear, step-by-step introduction to reading and interpreting picture graphs (also known as pictographs). Using a farm-themed example, the narrator guides viewers through the essential components of a graph, including the title, axis labels, and most importantly, the key or legend. The video demonstrates how to count symbols in different categories to gather data and how to perform basic addition to interpret that data. The content focuses on data representation and analysis appropriate for early elementary students. It explores themes of counting, sorting, and analyzing information visually. The video specifically demonstrates how to translate visual icons into numerical values (e.g., counting mouse icons to determine there are 6 mice in the barn) and how to synthesize this information to answer questions about totals and specific categories. For teachers, this video serves as an excellent introduction or review of graphing concepts. It models the thinking process required to interpret data, verbally articulating questions like 'How many mice are in the barn?' and 'What is the total number of mice?' It can be used to spark learning by having students follow along and count before the narrator reveals the answers, or as a model for students to create their own picture graphs based on classroom data.

Khan AcademyKhan Academy

2mins 47s

Video
Learning Number Bonds: Adding Parts to Make a Whole

Learning Number Bonds: Adding Parts to Make a Whole

This educational video introduces young learners to the mathematical concept of number bonds, a key foundation for understanding addition and subtraction. Through a series of clear, colorful visual demonstrations, the video illustrates how two separate groups (parts) can be combined to form a total number (the whole). It progresses from using static manipulatives like linking cubes to animated scenarios featuring ants and alligators to keep students engaged while reinforcing the math concepts. The content explores several key themes including counting, decomposing numbers, the commemorative property of addition, and the concept of zero. It specifically uses the language of "parts" and "whole" to help students verbalize their mathematical thinking. The video covers sums up to 9, demonstrating various combinations such as 2+1, 3+3, 2+7, and importantly, 7+0, helping to clarify that adding zero results in the same number. For educators, this video is an excellent tool for introducing or reinforcing early arithmetic skills in Kindergarten and 1st Grade classrooms. It bridges concrete representation (cubes/animals) with abstract notation (number bond diagrams with digits). Teachers can use this video to launch lessons on addition, as a visual anchor for explaining the "part-part-whole" relationship, or as a model for students to create their own math stories using physical manipulatives.

MatholiaChannelMatholiaChannel

2mins 10s

Video
How to Subtract by Counting Back

How to Subtract by Counting Back

This educational video introduces early learners to the subtraction strategy of "counting back." Through three clear, visual examples involving eggs, books, and linking cubes, the video demonstrates how to solve subtraction problems by starting at the whole number and counting backwards by the amount being subtracted. Each example progresses from a real-world scenario to a visual counting method, and finally to a written mathematical equation. The video focuses on the fundamental concept of subtraction as "taking away" and connects it directly to the mental math strategy of counting backwards. It uses clear visual aids—specifically curved lines representing "hops" backwards on a number line—to help students visualize the abstract concept of decreasing value. The examples used (7-3, 8-4, and 9-3) cover single-digit subtraction within 10. This resource is highly valuable for Kindergarten and 1st Grade classrooms introducing subtraction strategies beyond simple counting of remaining objects. It bridges the gap between concrete manipulatives (like counting physical eggs) and abstract mental math (counting back in one's head). Teachers can use this to model how to use number lines or mental counting to solve equations efficiently.

MatholiaChannelMatholiaChannel

2mins 27s

Video
Visualizing Number Bonds with Linking Cubes

Visualizing Number Bonds with Linking Cubes

This educational video introduces early learners to the concept of number bonds using concrete manipulatives. Through a clear, step-by-step demonstration with colorful linking cubes, the video illustrates the part-part-whole relationship in mathematics. It specifically focuses on how two smaller numbers (parts) combine to form a larger number (the whole), utilizing a standard number bond diagram to visualize these connections alongside physical objects.

MatholiaChannelMatholiaChannel

2mins 23s

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Writing Addition Equations with Pictures

Writing Addition Equations with Pictures

This educational video introduces young learners to the concept of addition through visual examples and step-by-step equation writing. Using concrete objects like kittens, cherries, and eggs, the video demonstrates how to combine two groups to find a total. It explicitly connects visual counting to the abstract representation of mathematics by showing how to translate physical quantities into both written sentences and numerical equations. The content focuses on three key themes: identifying parts of a whole, understanding number bonds (part-part-whole relationships), and learning mathematical vocabulary. It guides students through the process of recognizing distinct groups, counting them, and then expressing that relationship using the terms "plus" and "equals," as well as the symbols "+" and "=". This progression helps bridge the gap between counting and formal arithmetic. For educators, this video serves as an excellent instructional tool for modeling how to write addition equations. It reinforces the "part-part-whole" model using clear number bond diagrams alongside the equations. Teachers can use this video to scaffold lessons on addition, helping students move from counting physical manipulatives to writing their own number sentences. The repetitive structure allows for predictable learning, making it ideal for pause-and-discuss sessions where students predict the answers before they appear on screen.

MatholiaChannelMatholiaChannel

2mins 18s

Video
Learning to Count Backwards to Zero

Learning to Count Backwards to Zero

This educational video introduces early learners to the concept of counting backwards and the specific value of zero through a simple, visual demonstration using flowers in a pot. The video systematically removes one flower at a time, starting from three and ending with an empty pot, providing a concrete visual representation of subtraction and descending numerical order. The clear narration pairs spoken numbers with written numerals and words, reinforcing number recognition and literacy simultaneously. The content focuses on two primary mathematical themes: sequential counting backwards (3, 2, 1, 0) and the conceptual understanding of zero as "none" or the absence of items. By explicitly showing the empty pot and labeling it as "no flowers" and then "zero flowers," the video helps bridge the abstract concept of zero with a tangible real-world example. The handwriting animation for both digits and number words further supports fine motor visualization and literacy development. For educators, this video serves as an excellent hook for lessons on subtraction, countdowns, or the introduction of zero. It effectively uses the "fading" scaffolding technique—starting with a full set and reducing it—to teach the sequence of counting back. Teachers can use this video to transition students from counting objects (cardinality) to understanding the sequence of numbers in reverse, making it a foundational resource for Pre-K and Kindergarten math curriculums.

MatholiaChannelMatholiaChannel

1min 52s

Video
How to Add by Putting Groups Together

How to Add by Putting Groups Together

This educational video introduces early learners to the concept of addition through the strategy of "putting together." Using clear, simple animations of familiar objects like burgers, cubes, and counters, the video demonstrates how combining two distinct groups results in a larger total sum. The narrator guides viewers through counting each group individually before physically moving the items together to count the new total.

MatholiaChannelMatholiaChannel

3mins 16s

Video
Learning Number Bonds of 5 with Cubes

Learning Number Bonds of 5 with Cubes

This instructional video provides a clear, step-by-step demonstration of number bonds for the number 5 using concrete manipulatives. By utilizing connecting cubes in two contrasting colors (yellow and green), the video systematically explores every possible integer combination that sums to 5, starting from 5+0 and proceeding to 0+5. The visual representation of a "cube train" changing color one block at a time effectively illustrates the concept of decomposition and the relationship between parts and a whole. The video covers key mathematical themes essential for early numeracy, specifically the part-part-whole relationship and the foundational logic of addition. It subtly introduces the commutative property by showing that 2+3 and 3+2 both result in the same whole. The use of a standard number bond diagram (three connected circles) alongside the physical cubes helps bridge the gap between concrete objects and abstract mathematical notation. For educators, this video serves as an excellent model for introducing addition facts without relying initially on written equations. It is particularly useful for visual learners and can be easily replicated in the classroom using physical manipulatives. The pacing allows for interactive viewing, where students can predict the next number bond before it is revealed, making it a versatile tool for both direct instruction and guided practice in early elementary mathematics.

MatholiaChannelMatholiaChannel

1min 47s

Video
Introduction to Subtraction by Taking Away

Introduction to Subtraction by Taking Away

This video introduces the fundamental concept of subtraction through a clear, visual "taking away" method. Using a digital whiteboard, the narrator demonstrates two specific problems: 4 minus 3 and 5 minus 2. For each problem, the process involves drawing a set of objects representing the starting number, physically crossing out the number of objects being subtracted, and counting the remaining objects to find the answer. The content focuses on building conceptual understanding rather than rote memorization. By linking the abstract numerical equation to concrete visual representations (purple circles), the video helps young learners visualize what the minus sign actually operations. It also subtly introduces algebraic thinking in the second example by presenting the equation with the unknown on the left side (3 = 5 - 2). Ideally suited for early elementary classrooms, this video serves as an excellent hook for introduction to subtraction lessons or as a remediation tool for students struggling with the concept. Teachers can use it to bridge the gap between manipulative-based math and writing equations. It models a specific strategy—drawing pictures to solve problems—that students can immediately adopt in their own independent work.

Khan AcademyKhan Academy

3mins 38s

Video
Learning More Than and Less Than with Visuals

Learning More Than and Less Than with Visuals

This educational video introduces young learners to the foundational arithmetic concepts of "more than" and "less than" through clear, visual demonstrations. Using concrete objects like apples, connecting cubes, and teddy bears, the video guides students through four distinct examples: two focusing on addition (finding one more and two more) and two focusing on subtraction (finding one less and three less). Each example follows a structured pattern: presenting an initial quantity, performing an action to change that quantity, counting the new total, and stating the final mathematical relationship. The key themes explored are basic counting, simple addition and subtraction, and the specific vocabulary of comparison ("more than" vs. "less than"). The video explicitly bridges the gap between physical counting and abstract number sentences by visually demonstrating the action of adding to or taking away from a set. The consistent use of counting aloud helps reinforce one-to-one correspondence and cardinality. For educators, this video serves as an excellent visual model for introducing early operations. It is particularly useful for bridging the transition from counting sets to understanding arithmetic operations. Teachers can use this video to model how to use manipulatives (like the connecting cubes shown) to solve problems. It provides a clear framework for students to practice predicting outcomes before verifying them by counting, making it a valuable tool for building number sense in early elementary classrooms.

MatholiaChannelMatholiaChannel

2mins 31s

Video
Composing and Decomposing Numbers with Apples

Composing and Decomposing Numbers with Apples

This engaging animated video introduces early learners to the fundamental mathematical concepts of composing and decomposing numbers. Through the narration of a quirky red character, the video explains that composing is putting little numbers together to make a bigger number, while decomposing is taking a bigger number apart into smaller ones. The video progresses from abstract number bonds to concrete examples using animated apples to demonstrate these concepts visually.

Scratch GardenScratch Garden

7mins 49s

Video
Mastering Addition with the Counting On Strategy

Mastering Addition with the Counting On Strategy

This instructional math video introduces early learners to the "counting on" strategy for addition. Instead of counting every single item in two groups starting from one, the video demonstrates how to identify the total in the first group and then continue counting forward to determine the sum. This efficient method serves as a crucial bridge between counting all objects and fluent mental addition. The video presents three distinct examples using familiar objects: tomatoes, connecting cubes, and counters. For each example, the narrator guides viewers through the process of recognizing the initial quantity, circling it, and then visually "jumping" to the next items while counting aloud. The progression moves from adding 3+2, to 5+3, and finally 5+5, reinforcing the concept with clear visual aids and handwritten annotations. Ideally suited for Kindergarten and First Grade classrooms, this resource provides a clear model for a fundamental arithmetic strategy. Teachers can use it to introduce the concept of "counting on," to support struggling learners who still count from one every time, or as a visual anchor for lessons on combining sets. The clear pacing allows for choral counting and active student participation during viewing.

MatholiaChannelMatholiaChannel

2mins 59s

Video
Counting Strategies for Circles and Rows

Counting Strategies for Circles and Rows

A focused mathematics tutorial that demonstrates strategies for counting objects arranged in different patterns, specifically circles, scattered groups, and arrays. The narrator guides viewers through four distinct counting exercises involving animated dogs, mice, and cookies, modeling the thought process required to count accurately without making common errors. The video specifically emphasizes the concept of "one-to-one correspondence" and strategies to avoid double-counting, particularly when objects are arranged in a continuous circle. By explicitly marking a starting point mentally and stopping before overlapping, the narrator models critical metacognitive strategies for early learners. This resource is highly valuable for early childhood classrooms as a direct instruction tool or intervention for students struggling with counting accuracy. It moves from simple circular arrangements (numbers 5-10) to more complex arrays involving teen numbers (up to 19), providing a scaffolded approach to learning cardinality.

Khan AcademyKhan Academy

1min 44s

Video
Learning to Add Numbers with Fun Examples

Learning to Add Numbers with Fun Examples

This engaging educational video introduces young learners to the fundamental concept of addition through a series of relatable, real-world scenarios. Hosted by an animated narrator, the video defines addition simply as "putting numbers together" and demonstrates this using visual manipulatives like strawberries, carrots, grocery items, and dogs. The content progresses from simple counting to forming equations, introducing the plus sign and equals sign naturally within the narrative. Key themes include single-digit addition (sums up to 10), the concept of zero (identity property of addition), and the strategy of "counting on" to check answers. The video effectively bridges the gap between concrete objects and abstract numerals by showing the physical items alongside their numerical representations. It features a mix of animation and real-world footage to keep visual interest high. For educators, this video serves as an excellent introduction or review of basic arithmetic. It is designed with built-in pauses that allow students to answer before the narrator reveals the solution, making it an interactive tool for whole-class instruction. The real-world contexts—such as shopping for fruit or counting dogs at a park—provide teachers with concrete anchors to help students visualize math problems in their own lives.

Homeschool PopHomeschool Pop

7mins 6s

Video
Different Ways to Make the Number 7

Different Ways to Make the Number 7

This educational video introduces young learners to the concept of number decomposition, specifically focusing on the number 7. Through a clear, systematic visual demonstration, the narrator explores all the different integer pairs that sum to seven. The video utilizes a split-screen approach, showing concrete manipulatives (blue blocks) on the left to represent quantity, and abstract number bond diagrams on the right to represent the mathematical relationship. The content methodically moves through the number combinations in ascending order, starting with 1 and 6, then 2 and 5, continuing through to 6 and 1. This structured progression helps students recognize patterns in addition, such as the relationship between increasing one addend while decreasing the other. It also implicitly introduces the commutative property of addition by showing that 3 and 4 make 7, just as 4 and 3 do. For educators, this video serves as an excellent bridge between concrete counting and abstract arithmetic. It is particularly useful for teaching number sense, part-part-whole relationships, and basic addition facts. The clear visual layout allows teachers to pause the video before the answers are written, encouraging students to subitize or count the remaining blocks to predict the missing number in the bond.

MatholiaChannelMatholiaChannel

1min 57s

Video
Learning Addition by Combining Groups in Nature

Learning Addition by Combining Groups in Nature

This engaging animated video introduces early learners to the concept of addition through the visual strategy of combining groups. Set in a colorful park environment, the narrator guides students through various scenarios involving nature—such as children sitting on a log, birds in a nest, worms in the ground, frogs on lily pads, and flowers in pots. Each scenario presents two distinct groups of items that are counted separately before being combined to find the total sum. The video focuses on key early math themes including counting, one-to-one correspondence, and the foundational concept of addition as "putting together." It explicitly uses the language "[Number] and [Number] make [Total]," helping students transition from counting individual objects to understanding mathematical relationships. The visual cues, such as glowing outlines around the groups being counted, support visual learners in tracking the addends. For educators, this video is an excellent tool for introducing addition up to 10 in Pre-K through 1st-grade classrooms. It provides clear, concrete examples that can be easily replicated with manipulatives or acted out by students. The pacing allows for interactive viewing, where teachers can pause to ask students to predict the total before the narrator reveals it, fostering engagement and checking for understanding.

MatholiaChannelMatholiaChannel

2mins 13s

Video
How to Find Cube Roots of Large Numbers Mentally

How to Find Cube Roots of Large Numbers Mentally

This math tutorial demonstrates a clever mental math technique for finding the cube root of large perfect cubes without using a calculator. The video begins by establishing the foundational knowledge required: memorizing perfect cubes from 1 to 10 and recognizing the specific patterns that exist between the last digit of a number and the last digit of its cube. The narrator systematically builds a reference table on the screen to guide viewers through the process. The core of the video is a step-by-step walkthrough of an algorithm that simplifies complex roots into two manageable steps. First, viewers learn to identify the last digit of the answer by looking at the last digit of the large number. Second, they learn how to find the preceding digits by "sandwiching" the remaining part of the number between known perfect cubes. The video progresses from 5-digit numbers up to 7-digit numbers, providing multiple practice opportunities to reinforce the skill. For educators, this video serves as an engaging hook for lessons on exponents, roots, and number sense. It moves beyond rote memorization of algorithms by encouraging students to look for patterns in numbers and use estimation strategies. It is particularly useful for Math Olympiad preparation, enrichment activities, or as a confidence-building exercise in Algebra classes to demystify large numbers and roots.

The Organic Chemistry TutorThe Organic Chemistry Tutor

11mins 49s

Video
Finding Missing Numbers in Patterns

Finding Missing Numbers in Patterns

This educational video introduces primary students to the concept of number patterns and sequences using a clear, visual approach. Through a series of animated examples involving colorful balloons, the video demonstrates how to identify the "rule" of a pattern—such as adding 1, adding 2, subtracting 1, or subtracting 2—to determine missing numbers in a sequence. The content progresses from simple ascending sequences to descending ones, providing a comprehensive introduction to algebraic thinking. The video explores key mathematical themes including skip counting, addition and subtraction strategies, and logical reasoning. It emphasizes the importance of checking the relationship between adjacent numbers to establish a consistent pattern before trying to solve for unknowns. The visual cues, such as arrows indicating the operation between steps, help scaffold the learning process for visual learners. For educators, this video serves as an excellent instructional tool for math centers or whole-group introductions to patterning. It supports the development of early algebraic skills by asking students to analyze numerical relationships rather than just perform calculations. The clear pacing allows for natural pauses where teachers can ask students to predict the next number, making it highly interactive and suitable for 1st and 2nd-grade math curriculums.

MatholiaChannelMatholiaChannel

2mins 41s

Video
How Domain Affects Sequence Formulas

How Domain Affects Sequence Formulas

This advanced algebra video explores the relationship between mathematical sequences and their domains, challenging the standard convention that sequences must always begin with the first term at n=1. The narrator demonstrates that sequences can be defined using different starting points for the domain (specifically n=0 vs n=1) as long as the formula is adjusted accordingly. Through clear examples of both arithmetic and geometric sequences, viewers learn how to manipulate explicit and recursive formulas to match specific domain constraints. The video breaks down three specific examples: a doubling geometric sequence starting at 4, a decreasing arithmetic sequence starting at 52, and an alternating geometric sequence starting at 1. For each, the narrator compares valid and invalid formulas, showing how changing the starting value of 'n' changes the structure of the equation. A key segment involves an "imposter" activity where students must analyze four different formulas to identify the one that does not produce the correct sequence based on its defined domain. This resource is highly valuable for high school algebra classrooms as it moves students beyond rote memorization of formulas into a deeper conceptual understanding of functions and domains. It addresses the common student struggle of reconciling different notations for the same pattern. Teachers can use this video to introduce zero-indexing (common in computer science) or to reinforce the importance of checking work by substituting values. It promotes critical thinking by asking students to verify formulas rather than just generate them.

Miacademy & MiaPrep Learning ChannelMiacademy & MiaPrep Learning Channel

6mins 58s

Video
How to Solve Geometric Sequences with Negatives and Fractions

How to Solve Geometric Sequences with Negatives and Fractions

This educational math video explores advanced concepts in geometric sequences, moving beyond simple positive whole numbers to examine sequences involving negative numbers and fractions. The narrator, Justin, guides viewers through three distinct examples that demonstrate how common ratios can result in alternating signs or decreasing values. The video addresses the common confusion students face when numbers don't simply get "bigger" in a multiplicative pattern, introducing algebraic methods to find the common ratio definitively.

Miacademy & MiaPrep Learning ChannelMiacademy & MiaPrep Learning Channel

3mins 11s

Video
Solving Addition and Subtraction Input-Output Tables

Solving Addition and Subtraction Input-Output Tables

This educational math video by Mr. J provides a clear, step-by-step tutorial on solving input and output tables using addition and subtraction rules. The video guides students through four distinct examples, progressing from horizontal tables to vertical tables, and increasing in complexity by requiring students to find missing input values using inverse operations. Mr. J demonstrates how to identify the relationship between numbers to determine the 'rule' and then apply that rule to complete the table. The content focuses on key algebraic concepts including pattern recognition, determining function rules, and understanding the relationship between input and output values. A significant portion of the video is dedicated to the critical thinking skills required to verify a rule across multiple data points before applying it. The video also covers the concept of inverse operations, showing students how to work backwards from an output to find a missing input. For educators, this video serves as an excellent instructional tool for introducing or reinforcing function tables in upper elementary grades. It models the thought process of checking if values are increasing (addition) or decreasing (subtraction) and encourages students to verify their work. The clear visual layout and methodical pacing make it ideal for direct instruction, independent review stations, or as a reference for homework support in 3rd through 5th-grade math curriculums.

Math with Mr. JMath with Mr. J

5mins 10s

Video
Proving the Sum of an Arithmetic Series Formula

Proving the Sum of an Arithmetic Series Formula

A focused mathematics tutorial that explains the difference between arithmetic sequences and series, demonstrates how to calculate the partial sum of a series, and provides a step-by-step algebraic proof for the arithmetic series sum formula. The video begins by distinguishing between a sequence (a list of numbers) and a series (the sum of those numbers) using a specific numerical example (5, 8, 11, 14, 17). The core of the video explores the derivation of the formula Sn = n/2 * (a1 + an). The instructor uses the "Gaussian method" of writing the series sum forwards and backwards, then adding the two equations together. This visual algebraic demonstration highlights how the common differences cancel out, leaving a clean result that proves why the formula works. This resource is highly valuable for high school Algebra II or Pre-Calculus classrooms. It moves beyond rote memorization by teaching the "why" behind the math. Teachers can use this to introduce the concept of formal proofs or to help students visualize the symmetry inherent in arithmetic progressions.

The Organic Chemistry TutorThe Organic Chemistry Tutor

6mins 38s

Video
Learning to Skip Count by Fives with Visuals

Learning to Skip Count by Fives with Visuals

This educational video introduces the concept of skip counting by fives using three distinct visual methods to support early learners. It begins with a concrete example using flower pots, where each pot contains five flowers, allowing students to visualize the quantity being added each time. The video then transitions to abstract representations, utilizing a number line to demonstrate the "jumps" between numbers, and finally a hundred square grid to highlight the visual patterns that emerge when counting by fives to fifty. Key themes explored include basic arithmetic progressions, number patterns, and the foundational skills required for multiplication. The video explicitly connects the act of counting objects to number sequences, helping students bridge the gap between counting one-by-one and grouping numbers. The final segment focuses on pattern recognition within a number grid, drawing attention to how multiples of five always end in either 5 or 0. For educators, this video serves as an excellent instructional tool for introducing or reinforcing skip counting. It is particularly useful for visual learners who benefit from seeing the "jumps" on a number line or the vertical columns lighting up on a hundred chart. The clear, paced narration allows for choral counting in the classroom, and the concluding question regarding patterns provides a natural segue into a class discussion about number properties and prediction.

MatholiaChannelMatholiaChannel

1min 52s

Video
How to Find the Next Number in a Pattern

How to Find the Next Number in a Pattern

This educational video teaches students how to identify and complete number patterns using clear visual aids and narration. Through four distinct examples involving colorful balloons, the video demonstrates arithmetic sequences involving both addition (skip counting forward) and subtraction (counting backward). It systematically breaks down the process of finding the rule between consecutive numbers to determine the next number in the sequence. Key themes include pattern recognition, basic arithmetic (addition and subtraction), and critical thinking skills related to algebraic reasoning. The video covers skip counting by 2s and 5s, as well as counting backwards by 1s and 2s, reinforcing mental math strategies in a step-by-step format. Ideally suited for early elementary classrooms, this video provides a solid foundation for algebraic thinking. Teachers can use it to introduce the concept of "rules" in sequences, support lessons on skip counting, or use the pause points as checks for understanding. The clear visual representation of the "jump" between numbers helps students visualize the mathematical operation occurring at each step.

MatholiaChannelMatholiaChannel

2mins 43s

Video
Analyzing Relationships Between Number Patterns

Analyzing Relationships Between Number Patterns

This instructional math video guides students through the process of generating numerical patterns based on specific rules and then analyzing the mathematical relationships between two related patterns. The instructor, Mr. J, demonstrates how to create sequences by following "start at" and "add/subtract" directions, subsequently teaching viewers how to identify functional relationships between corresponding terms in the two sequences. The video covers four distinct examples involving addition, multiplication, division, and subtraction rules connecting the patterns. The core themes include generating numerical patterns, identifying arithmetic sequences, and determining algebraic relationships (rules) between two sets of numbers. A significant focus is placed on the vocabulary of "terms" and "corresponding terms," as well as the importance of verifying mathematical rules across multiple data points rather than assuming a pattern based on a single pair. The video introduces foundational algebraic thinking by expressing these relationships as equations (e.g., A + 2 = B or 3x = y). For educators, this video serves as an excellent direct instruction tool for Common Core standard 5.OA.B.3. It models precise mathematical procedures and metacognitive strategies, such as checking work to ensure validity. Teachers can use this video to introduce the concept of input/output tables, prepare students for graphing ordered pairs on a coordinate plane, or as a remediation tool for students struggling to see the connection between two changing variables.

Math with Mr. JMath with Mr. J

10mins 11s

Video
How to Use Interactive Number Lines for Math

How to Use Interactive Number Lines for Math

A detailed tutorial demonstrating the features and pedagogical applications of an interactive number line tool for elementary mathematics. The video showcases how digital manipulatives can be used to visualize key concepts including counting, addition, subtraction, and number patterns using customizable intervals and steps. The content explores specific functionalities such as using digital ink to annotate equations, customizing number line variables (start number, intervals, step count), and using interactive 'jump' blocks to model arithmetic operations. It demonstrates how to scaffold learning by hiding or revealing numbers to test student understanding of sequences and patterns. This resource is particularly valuable for teachers and parents looking for effective ways to model abstract math concepts visually. It highlights how technology can support differentiation in math instruction, allowing for real-time customization of problems—from basic counting to more complex skip counting and multi-digit arithmetic—suitable for various learning levels.

MatholiaChannelMatholiaChannel

1min 42s

Video
Finding Missing Numbers in Sequences

Finding Missing Numbers in Sequences

This educational video guides students through four distinct examples of identifying and solving number patterns. Using a visual aid of colorful balloons arranged in sequences, the narrator demonstrates how to determine the rule governing each pattern—whether the numbers are increasing or decreasing and by what amount. The video covers skip counting by twos, counting backward by ones, counting backward by twos, and counting backward by tens. The key themes explored include pattern recognition, mental addition and subtraction, and sequence completion. The video emphasizes the strategy of looking at consecutive known numbers to identify the mathematical rule (e.g., "plus 2" or "minus 10") before applying that rule to find the missing values. It visually represents these arithmetic steps with arrows connecting the balloons, reinforcing the concept of intervals between numbers. For educators, this video serves as an excellent modeling tool for early elementary math lessons on algebra and functions. It clearly articulates the thought process required to solve these problems, making it valuable for introducing skip counting or reviewing subtraction strategies. The clear visual layout helps students transition from concrete counting to more abstract numerical relationships, and the pause before revealing answers provides natural opportunities for whole-class engagement and prediction.

MatholiaChannelMatholiaChannel

2mins 56s

Video
Differentiating Deductive and Inductive Reasoning

Differentiating Deductive and Inductive Reasoning

This educational video provides a clear and structured explanation of the difference between deductive and inductive reasoning, two fundamental types of logic used in mathematics and critical thinking. The lesson begins by defining reasoning as thinking logically and then breaks down the specific characteristics of each type. Deductive reasoning is defined as reaching a conclusion based on facts, guaranteeing a true result if the premises are true. Inductive reasoning is defined as making educated predictions based on observed patterns, which yields probable but not guaranteed conclusions.

Miacademy & MiaPrep Learning ChannelMiacademy & MiaPrep Learning Channel

9mins 58s

Video
Skip Counting by 4s with Space Rockets

Skip Counting by 4s with Space Rockets

This engaging animated music video teaches students how to skip count by fours, taking them on a space-themed journey from 4 all the way to 100. Through a catchy rock-style song and vibrant animations of rockets and space cows, the video breaks down the process of adding four repeatedly, providing both auditory and visual cues to help students memorize this essential mathematical sequence. Key themes include skip counting, number patterns, and the foundations of multiplication. The video explicitly highlights the recurring pattern in the ones digit (ending in 2, 4, 6, 8, or 0), offering students a helpful rule to self-check their work. The progression builds in difficulty, starting with a count to 20, then 40, and finally reaching 100, allowing for scaffolded learning. For educators, this video serves as an excellent hook for math lessons on repeated addition or multiplication. It transforms rote memorization into a fun, rhythmic activity that improves retention. The clear visual representation of numbers appearing alongside space rockets helps visual learners connect the spoken number with its written form, while the musical element supports auditory learners in internalizing the sequence.

Scratch GardenScratch Garden

2mins 19s

Video
Mastering Skip Counting by 20s to 500

Mastering Skip Counting by 20s to 500

This engaging animated music video teaches students how to skip count by 20s, extending the sequence all the way to 500. Set against a whimsical outer space backdrop, the video features astronaut cats and a rocket-piloting worm who guide viewers through three increasing rounds of counting. The song introduces a helpful mental math strategy—relating counting by 20s to counting by 2s—making the concept accessible and memorable. The video explores themes of number patterns, place value, and the relationship between single-digit multiplication and tens. It visually reinforces the auditory counting with clear, large numbers appearing on screen, synchronized with the beat. The narrative arc builds in complexity, starting with a simple count to 100, then 200, and finally a rapid-fire challenge to 500, encouraging fluency. For educators, this resource is an excellent tool for math warm-ups, transitioning between lessons, or reinforcing place value concepts. It supports the development of number sense and prepares students for more complex multiplication and division tasks. The catchy melody and repetitive structure allow for active participation, making it suitable for whole-class singing and movement activities.

Scratch GardenScratch Garden

2mins 39s

Video
Finding Missing Numbers in Patterns

Finding Missing Numbers in Patterns

This educational math video guides students through identifying and solving number patterns using three-digit numbers. The video presents four distinct scenarios where a sequence of numbers is displayed on hanging flags with specific numbers missing. For each sequence, the narrator identifies the pattern rule—such as counting up by ones, counting down by tens, counting up by hundreds, or subtracting three—and demonstrates how to apply that rule to find the missing values. The content focuses on key algebraic thinking skills appropriate for elementary students, specifically recognizing numerical relationships and extending sequences. It reinforces place value understanding by showing how changing the hundreds, tens, or ones place affects the number value. The video models mental math strategies, verbalizing the addition or subtraction process required to move from one number to the next. This resource is highly valuable for introducing or reviewing number patterns in the classroom. Its clear visual representation of the "jumps" between numbers helps visual learners grasp the concept of intervals. Teachers can use this video to model problem-solving strategies, specifically how to determine a pattern's rule from known consecutive numbers and then apply it to fill in gaps, both forwards and backwards in a sequence.

MatholiaChannelMatholiaChannel

3mins 54s

Video
Unlocking the Secrets of Pascal's Triangle

Unlocking the Secrets of Pascal's Triangle

This educational video provides a deep dive into Pascal's Triangle, revealing it not just as a stack of numbers, but as a powerful tool for solving complex mathematical problems. The lesson begins by connecting the triangle to the concept of combinations ($nCr$), demonstrating how calculating choices leads to symmetrical patterns. It visually constructs the triangle row-by-row, showing how each number is derived from the sum of the two numbers directly above it, effectively bypassing the need for tedious factorial formulas.

Miacademy & MiaPrep Learning ChannelMiacademy & MiaPrep Learning Channel

15mins 44s

Video
How to Find the Nth Term of an Arithmetic Sequence

How to Find the Nth Term of an Arithmetic Sequence

This math tutorial provides a clear, step-by-step guide on solving problems involving arithmetic sequences. The instructor demonstrates two distinct types of problems: first, finding a specific term (the "nth" term) when given the starting sequence, and second, finding a specific term when given only two non-consecutive terms within the sequence. The video emphasizes understanding the core formula for arithmetic sequences and verifies answers by manually listing terms to build conceptual confidence. The content focuses on key algebraic concepts including identifying the first term (a1), calculating the common difference (d), and applying the explicit formula an = a1 + (n-1)d. The video breaks down the algebraic manipulation required to solve for unknown variables, such as working backwards to find the first term when it is not explicitly given. This resource is highly valuable for Algebra 1 and Algebra 2 classrooms. It serves as an excellent direct instruction tool or review material for students struggling with sequence formulas. The logical, paced explanation of how to bridge the gap between two distant terms (e.g., the 3rd and 7th terms) helps students visualize the "steps" or differences between numbers, reinforcing linear growth concepts essential for understanding linear functions.

The Organic Chemistry TutorThe Organic Chemistry Tutor

6mins 13s

Video
Mastering Geometric Series: Formulas and Examples

Mastering Geometric Series: Formulas and Examples

This video serves as a comprehensive tutorial on understanding and solving geometric series problems using the geometric series formula. Hosted by Randy, the lesson breaks down the specific components of the formula—sum, first term, common ratio, and number of terms—before demonstrating how to identify these variables within a sequence of numbers. The video adopts a clear, step-by-step approach, making complex algebraic substitutions easy to follow for students encountering sequences and series for the first time.

Miacademy & MiaPrep Learning ChannelMiacademy & MiaPrep Learning Channel

9mins 56s

Video
How to Find the Rule in Input and Output Tables

How to Find the Rule in Input and Output Tables

In this instructional math video, "Mr. J" provides a clear, step-by-step tutorial on solving input and output tables, also known as function tables. The video systematically covers four distinct examples, each corresponding to one of the basic operations: subtraction, multiplication, addition, and division. Using a digital blackboard format, the narrator demonstrates how to analyze the relationship between input and output numbers to determine the underlying rule. The content focuses on developing algebraic thinking by teaching students to identify patterns. A key theme is the strategy of determining whether values are increasing or decreasing to narrow down possible operations. For instance, the video explicitly models the process of trial and error—testing an addition rule first, realizing it fails for subsequent rows, and then correctly identifying a multiplication rule. It also addresses different table formats, showing both horizontal and vertical orientations. This video is an excellent resource for upper elementary classrooms introducing functions and patterns. It provides a solid model for "checking your work," as the narrator emphasizes that a rule must apply to every pair in the table, not just the first one. Teachers can use this video to introduce the concept of function rules, reinforce mental math strategies, or as a review tool for students struggling to distinguish between additive and multiplicative patterns.

Math with Mr. JMath with Mr. J

5mins 6s

Video
Writing Recursive Formulas for Arithmetic Sequences

Writing Recursive Formulas for Arithmetic Sequences

This concise mathematics video teaches students how to write recursive formulas for arithmetic sequences. Building on previous knowledge of listing sequences, the narrator demonstrates the reverse process: analyzing an existing sequence of numbers to derive its mathematical formula. The video breaks down the specific notation required for recursive formulas, emphasizing that two key components are always needed: the initial term and the common difference.

Miacademy & MiaPrep Learning ChannelMiacademy & MiaPrep Learning Channel

2mins 21s

Video
Writing Addition Equations with Pictures

Writing Addition Equations with Pictures

This educational video introduces young learners to the concept of addition through visual examples and step-by-step equation writing. Using concrete objects like kittens, cherries, and eggs, the video demonstrates how to combine two groups to find a total. It explicitly connects visual counting to the abstract representation of mathematics by showing how to translate physical quantities into both written sentences and numerical equations. The content focuses on three key themes: identifying parts of a whole, understanding number bonds (part-part-whole relationships), and learning mathematical vocabulary. It guides students through the process of recognizing distinct groups, counting them, and then expressing that relationship using the terms "plus" and "equals," as well as the symbols "+" and "=". This progression helps bridge the gap between counting and formal arithmetic. For educators, this video serves as an excellent instructional tool for modeling how to write addition equations. It reinforces the "part-part-whole" model using clear number bond diagrams alongside the equations. Teachers can use this video to scaffold lessons on addition, helping students move from counting physical manipulatives to writing their own number sentences. The repetitive structure allows for predictable learning, making it ideal for pause-and-discuss sessions where students predict the answers before they appear on screen.

MatholiaChannelMatholiaChannel

2mins 18s

Video
Using Bar Graphs to Compare Quantities

Using Bar Graphs to Compare Quantities

This video provides a clear, step-by-step tutorial on how to interpret data from a vertical bar graph to solve a comparison problem. The narrator demonstrates how to identify specific data points corresponding to different categories ('Bike World' and 'Bikes R Us') and determines the numerical value for each by reading the vertical axis. The content focuses on the key mathematical concept of finding the difference between two quantities. It explicitly models two distinct methods for solving the problem: first, by setting up a subtraction equation (19 - 12), and second, by visually counting the grid units on the graph to determine the 'gap' between the two bar heights. This dual approach reinforces the connection between arithmetic operations and visual data representation. This resource is excellent for early elementary classrooms introducing data analysis and graphing. It helps students transition from simply reading a graph to using the data to answer 'how many more' questions—a common hurdle for young learners. The video serves as a strong model for verifying answers, as it uses the visual counting method to check the arithmetic result.

Khan AcademyKhan Academy

1min 42s

Video
Mastering Addition by Adding 11

Mastering Addition by Adding 11

This educational music video features a catchy, rhythmic song designed to help students memorize addition facts involving the number 11. Through a repetitive and engaging pop-style melody, the video guides learners through equations ranging from 11 + 1 up to 11 + 15. The visual presentation is simple and focused, displaying clear white text against a purple gradient background to minimize distractions and keep attention on the mathematical concepts.

Have Fun TeachingHave Fun Teaching

2mins 26s

Video
Mastering Addition Facts: The Adding 13 Song

Mastering Addition Facts: The Adding 13 Song

A high-energy educational song designed to help students master addition facts involving the number 13. Through a catchy pop-rock melody, the video guides learners through a sequence of addition equations starting from 13 + 1 and extending up to 13 + 15. The repetitive chorus and rhythmic delivery serve as mnemonic devices, aiding in the retention of these specific math facts. Key mathematical themes include basic arithmetic, sum calculation, and mental math fluency. The song breaks the addition facts into three distinct sets (1-5, 6-10, and 11-15), allowing for chunked learning. This structure helps students recognize patterns in addition and builds confidence in handling double-digit numbers. This resource is an excellent classroom tool for auditory learners and can be effectively used during transitions, as a warm-up activity, or as part of a math fluency rotation. Because the video features a static visual, it functions best as an audio accompaniment to physical manipulatives, whiteboard work, or movement-based learning activities where students can solve the equations along with the music.

Have Fun TeachingHave Fun Teaching

2mins 19s

Video
Visualizing Addition to 20 Using Base-10 Blocks

Visualizing Addition to 20 Using Base-10 Blocks

This educational video demonstrates the process of adding numbers up to 20 without regrouping using the Concrete-Pictorial-Abstract (CPA) framework. Through clear animations, it guides students on how to solve the equation 14 + 4 by using virtual base-10 blocks placed on a place value chart alongside standard vertical written notation. The video explores key mathematical themes including place value (distinguishing between tens and ones), modeling numbers with manipulatives, and the step-by-step algorithm for column addition. It explicitly connects the physical act of combining 'ones' blocks to the abstract action of writing the sum in the ones column of an equation. For educators, this resource is an excellent visual aid for introducing or reinforcing early addition strategies. It supports visual learners by clearly separating the tens and ones columns and provides a model for how students can use physical manipulatives at their desks to solve similar problems. It serves as a perfect bridge between counting individual items and understanding the structure of two-digit addition.

MatholiaChannelMatholiaChannel

1min 21s

Video
Finding the Missing Number to Make 10 with Bananas

Finding the Missing Number to Make 10 with Bananas

This educational math video demonstrates how to solve a missing addend problem using concrete visual aids. Specifically, it tackles the equation "3 + _ = 10" by using drawings of bananas to represent the numbers. The narrator guides viewers through a "counting on" strategy, starting with the initial three bananas and drawing additional ones one-by-one until the total reaches ten. The video explores key themes of addition, equality, and the relationship between numbers that sum to ten (often called "friends of ten"). It visually distinguishes between the starting quantity and the added quantity, helping students understand that the missing number represents only the items added to reach the total, not the total itself. For educators, this video is an excellent tool for introducing or reinforcing algebraic thinking in early elementary grades. It bridges the gap between concrete counting and abstract equations. Teachers can use it to model how to use manipulatives to solve for unknown numbers, validating strategies like counting on or using drawing to solve math problems.

Khan AcademyKhan Academy

2mins

Video
Calculating the Perimeter of Irregular Quadrilaterals

Calculating the Perimeter of Irregular Quadrilaterals

This educational math video provides a clear, step-by-step guide on how to calculate the perimeter of various quadrilaterals, specifically focusing on shapes that are not standard squares or rectangles. Through the use of animated characters and scenarios, it introduces the concept of perimeter as the total distance around a two-dimensional shape and demonstrates the standard algorithm of summing all side lengths to find the answer. The video covers multiple examples, starting with a character running around an irregular quadrilateral track, moving to geometric shapes like parallelograms and trapezoids, and culminating in a real-world word problem about fencing a plot of land for sheep. It concludes with a practice problem for students to attempt on their own, reinforcing the procedural knowledge required to solve these math problems. Teachers can use this video to introduce the concept of perimeter or to model problem-solving strategies for geometry word problems. The step-by-step visual calculations (stacking numbers for addition) model good mathematical habits for students. The video is particularly useful for visual learners who benefit from seeing side lengths highlighted and summed sequentially.

Sheena DoriaSheena Doria

4mins 18s

Video
Solving Money Word Problems Using Bar Models

Solving Money Word Problems Using Bar Models

This educational video introduces students to solving money-based word problems using the Singapore Math bar modeling method. It presents two distinct scenarios: an addition problem determining the total cost of two items, and a subtraction problem calculating the price difference between two items. By visualizing the quantities as rectangular bars, the video helps bridge the gap between abstract word problems and concrete mathematical operations. The content focuses on key algebraic thinking skills appropriate for early elementary students, specifically distinguishing between "part-whole" relationships and "comparison" models. It demonstrates how to translate text into visual diagrams, identify the unknown variable (represented by a question mark), and select the correct operation (addition or subtraction) to solve the problem. For teachers, this video serves as an excellent tool for modeling mathematical thinking. It can be used to introduce the concept of bar models, reinforce strategies for solving word problems, or support students who struggle with determining whether to add or subtract. The clear, step-by-step visual progression makes it particularly effective for visual learners and for scaffolding complex problem-solving skills.

MatholiaChannelMatholiaChannel

1min 49s

Video
Adding Mixed Numbers and Regrouping Improper Fractions

Adding Mixed Numbers and Regrouping Improper Fractions

This engaging animated musical video teaches students how to add mixed numbers with like denominators through catchy lyrics and real-world story problems. The video follows characters in two distinct scenarios—harvesting pears in an orchard and buying trail mix at a grocery store—to demonstrate why and how we add mixed numbers in daily life. It uses visual models (circles divided into fractional parts) alongside standard vertical addition algorithms to solidify conceptual understanding. The content focuses on the specific skill of adding mixed numbers where the sum of the fractions is greater than one, requiring the student to "carry the one" or regroup. It breaks down the process into clear steps: adding the fractions, recognizing improper fractions, regrouping them into whole numbers, and then adding the whole numbers. The video also introduces the concept of decomposing mixed numbers into unit fractions, providing a deeper look at the structure of these numbers. For educators, this video serves as an excellent hook or review tool for 4th and 5th-grade math units on fractions. It provides multiple representations of the concept—visual, auditory, and algorithmic—helping to reach diverse learners. The inclusion of word problems helps students contextualize the math, while the "decomposing" section offers a natural extension for advanced understanding of fraction composition.

Math Songs by NUMBEROCKMath Songs by NUMBEROCK

3mins 56s

Video
Creating Number Sentence Families with Addition and Subtraction

Creating Number Sentence Families with Addition and Subtraction

This video introduces the mathematical concept of "number sentence families" (often called fact families) to young learners. Through clear, slow-paced visual demonstrations, it illustrates how three specific numbers can be related through both addition and subtraction equations. The video uses concrete objects—teddy bears and potted plants—to visually represent quantities, making abstract arithmetic concepts tangible. The content focuses on two distinct examples. The first uses a group of 5 teddy bears (3 brown, 2 pink) to demonstrate the relationships between the numbers 2, 3, and 5. The second example uses a row of 8 plants (5 green, 3 purple) to show the relationships between 3, 5, and 8. For each set, the video explicitly writes out four related equations: two addition problems demonstrating the commutative property (e.g., 3+2 and 2+3) and two subtraction problems demonstrating the inverse relationship (e.g., 5-3 and 5-2). This resource is highly valuable for early elementary classrooms introducing addition and subtraction connections. It visually reinforces the commutative property of addition and the concept of inverse operations without needing complex vocabulary. Teachers can use this video to transition students from counting physical objects to writing formal equations, providing a bridge between concrete manipulatives and abstract symbolic math.

MatholiaChannelMatholiaChannel

2mins 40s

Video
How to Evaluate Algebraic Expressions Using Algebra Tiles

How to Evaluate Algebraic Expressions Using Algebra Tiles

This educational video provides a clear, visual methodology for evaluating algebraic expressions using algebra tiles, a common mathematical manipulative. The video begins by defining the components of an algebraic expression—variables, operators, and numbers—before introducing a color-coded visual system where green rectangles represent variables (x), blue squares represent positive integers (+1), and red squares represent negative integers (-1). It establishes the crucial concept of "zero pairs," showing how positive and negative units cancel each other out, which is essential for understanding integer arithmetic. The core instruction demonstrates the process of substitution through two detailed examples. First, the narrator models evaluating 2x + 3 when x = 3, visually replacing variable tiles with the corresponding integer tiles to find the sum. Second, the video tackles a more complex problem involving negative numbers: evaluating 3x + 4 when x = -2. This example reinforces the zero pair concept as students watch red (negative) and blue (positive) tiles cancel out to reveal the final answer. Teachers can use this video to bridge the gap between concrete manipulatives and abstract algebraic notation. It is particularly valuable for introducing students to the concept of substitution and for reviewing integer rules in a tangible way. The video's step-by-step approach makes it an excellent tool for scaffolding lessons on evaluating expressions, helping visual learners grasp the underlying logic of algebraic operations before moving to purely symbolic calculation.

Mashup MathMashup Math

7mins 2s

Video
Visualizing Subtraction with Place Value Blocks

Visualizing Subtraction with Place Value Blocks

This video provides a clear, visual demonstration of subtracting a single-digit number from a two-digit number using place value concepts. The narrator uses digital manipulatives—specifically base-ten block drawings—to represent the number 46, decomposing it into four tens and six ones. This visual approach helps students concretely understand what the abstract numbers represent before any operations are performed. The core theme of the video is understanding subtraction through the lens of place value. By physically crossing out four 'ones' blocks from the original six, the video demonstrates that when subtracting single digits (without regrouping), the operation only affects the ones place while the tens place remains unchanged. This reinforces the concept that digits in different positions have specific values and function independently in simple operations. For educators, this video is an excellent tool for bridging the gap between concrete manipulatives and abstract equations. It is particularly useful for introducing non-regrouping subtraction in 1st or 2nd grade. Teachers can use this to model how to draw 'quick tens and ones' to solve problems, showing students a strategy they can use even without physical blocks. The video explicitly connects the visual act of taking away blocks to the numerical procedure of changing the digit in the ones place.

Khan AcademyKhan Academy

2mins 44s

Video
Subtracting Money: Dollars and Cents Without Regrouping

Subtracting Money: Dollars and Cents Without Regrouping

This educational video provides a clear, step-by-step demonstration of how to subtract amounts of money involving both dollars and cents. Using a specific mental math strategy known as decomposition or splitting, the narrator guides viewers through separating monetary values into whole dollar amounts and cent amounts before performing subtraction operations on each separately. This specific video focuses on problems that do not require regrouping (borrowing), making it an excellent introductory resource for students mastering money math. The content explores key themes of financial literacy, subtraction strategies, and number sense. By breaking complex decimal numbers down into manageable parts ($25 and 90 cents), it reinforces the concept of place value and helps students understand the relationship between whole numbers and decimals in a practical, real-world context. The video uses three distinct examples: comparing the cost of sports equipment, finding the price difference between two boxes, and a purely numerical subtraction problem. For educators, this video serves as a valuable visual aid for teaching mental math strategies distinct from the traditional vertical column algorithm. The "separate and conquer" approach shown here encourages left-to-right calculation, which is often more intuitive for mental estimation and quick pricing comparisons. It can be effectively used to introduce money operations in 3rd or 4th grade, support students struggling with the standard algorithm, or demonstrate alternative methods for checking answers.

MatholiaChannelMatholiaChannel

2mins 58s

Video
Mastering Number Bonds to Ten with Ten Frame Animals

Mastering Number Bonds to Ten with Ten Frame Animals

This engaging animated music video introduces young learners to the foundational math concept of "making ten" using ten frames and a cast of rhyming animal characters. Through a catchy song, students meet animals like Wombats, Bobcats, Muskrats, Gnats, and Bats, each representing a specific number quantity on a ten frame. The visual narrative demonstrates how adding a specific number of animals to an existing set completes the ten frame, reinforcing number bonds (pairs of numbers that add up to 10). The video systematically covers all number pairs that sum to ten, starting from 9+1 and working down to 5+5. Each segment presents a partial ten frame and asks the viewer to identify how many more are needed to fill it, followed by a visual animation of the missing addends filling the empty spots. The video includes a review section that explicitly states the addition equations (e.g., "Nine and one makes ten wombats") and a real-world application scene involving a sticker card at a shop. Teachers can use this video to introduce or review the "friends of ten" or number bonds, a critical skill for mental math fluency in early elementary grades. The visual representation of the ten frame helps students move from counting by ones to subitizing and understanding part-part-whole relationships. The song's repetitive structure and rhyming lyrics make the mathematical facts memorable, while the humorous text bubbles add a layer of engagement for proficient readers.

Math Songs by NUMBEROCKMath Songs by NUMBEROCK

3mins 28s

Video
Memorizing Addition Facts for the Number Six

Memorizing Addition Facts for the Number Six

This educational music video focuses on building math fluency through a catchy, rhythmic song dedicated to adding the number 6. Designed for early elementary students, the video utilizes a high-energy, repetitive musical structure to help children memorize addition facts. The content breaks down addition into three distinct sets, starting with basic facts (6+1) and progressing to more challenging equations (up to 6+15), allowing students to gradually build confidence in their mental math abilities. Themes of arithmetic, patterns, and number sense are explored through auditory learning. The song reinforces the commutative property of addition implicitly, while explicitly drilling the specific sums involving the number 6. The consistent beat aids in retention, leveraging the connection between music and memory to help students recall math facts quickly without needing to count on their fingers. For classroom application, this video serves as an excellent warm-up activity, transition tool, or focused drill for math centers. Teachers can use it to introduce the concept of adding 6, review facts before a test, or simply energize the class with a "math movement" break. The audio-centric nature of the resource makes it perfect for playing in the background during independent work or as a call-and-response activity where students shout out the answers before the singer does.

Have Fun TeachingHave Fun Teaching

2mins 18s

Video
How to Identify and Compare Integers on a Number Line

How to Identify and Compare Integers on a Number Line

This comprehensive math video serves as a fundamental introduction to integers, targeting students encountering negative numbers for the first time. It systematically breaks down the definition of integers, distinguishing them from fractions and decimals, and visualizing them clearly on a horizontal number line. The video moves from abstract definitions to concrete application by using relatble real-world scenarios—such as sea levels, elevator floors, and physical movement—to help students translate verbal descriptions into mathematical integer notation. The content explores several key topics including identifying positive and negative integers relative to zero, translating word problems into integer values (e.g., "backward" means negative), and moving along a number line to visualize addition and subtraction concepts. A significant portion of the video is dedicated to comparing integers using inequality symbols (< and >), with specific focus on the often-confusing concept of comparing two negative numbers, explaining why a number like -3 is actually greater than -5. For educators, this video is an excellent resource for bridging the gap between arithmetic and pre-algebra. It visually reinforces the concept that value increases as one moves right on the number line and decreases to the left. Teachers can use the specific real-life examples provided to create matching activities or word problems, and the clear visual demonstrations of comparison provide a solid foundation for teaching integer operations and inequalities.

Sheena DoriaSheena Doria

10mins 9s

Video
Solving Subtraction Word Problems Using Bar Models

Solving Subtraction Word Problems Using Bar Models

This educational video demonstrates how to solve mathematical word problems using bar models and column subtraction with numbers up to 10,000. It presents two distinct real-world scenarios: calculating the profit earned by an art dealer and determining the number of Sunday visitors to a botanical garden based on weekend totals. Each example follows a structured approach of reading the problem, visualizing it with a bar model to identify the unknown value, and performing the necessary calculation. The video explores key mathematical themes including part-whole relationships, the concept of "difference," and the practical application of subtraction in financial and statistical contexts. It specifically reinforces the vertical subtraction algorithm with regrouping (borrowing) across place values. The use of bar models serves as a crucial bridge between the text of the word problem and the abstract arithmetic required to solve it. For educators, this resource is an excellent tool for scaffolding instruction on word problems, which are often a stumbling block for students. The step-by-step visualization helps students understand *why* subtraction is the correct operation before they begin calculating. It is particularly useful for introducing the Singapore Math method of bar modeling or for reviewing subtraction with larger numbers in 3rd and 4th-grade classrooms.

MatholiaChannelMatholiaChannel

2mins 28s

Video
How to Find Distance on a Coordinate Grid

How to Find Distance on a Coordinate Grid

This educational video provides a clear, step-by-step guide to calculating distances on a coordinate plane, specifically targeting 6th-grade mathematics standards. The lesson progresses logically from finding the distance of a single point from the axes to calculating the distance between two distinct points that share a common coordinate. By incorporating the concept of absolute value, the video bridges the gap between arithmetic and geometry, helping students understand distance as a positive magnitude regardless of the quadrant. The content covers key topics including plotting ordered pairs in all four quadrants, understanding the relationship between coordinates and distance from axes, and using absolute value to sum distances when crossing an axis. It features practical applications, such as a narrative example involving a character traveling between locations on a map, and geometric applications where students must construct shapes based on vertex distance. Teachers can use this video to introduce or reinforce the concept of distance on a coordinate grid. The visual demonstrations of "counting boxes" alongside the mathematical method of using absolute value provide scaffolded learning that appeals to both visual and logical learners. The video is particularly useful for transitioning students from simple plotting to analyzing geometric relationships on a grid.

Miacademy & MiaPrep Learning ChannelMiacademy & MiaPrep Learning Channel

10mins 44s

Video
Mastering Addition Facts: The Adding 7 Song

Mastering Addition Facts: The Adding 7 Song

A high-energy musical resource designed to help early elementary students memorize addition facts involving the number 7. Through a catchy, electronic pop song, the video guides listeners through a sequence of equations ranging from 7 + 1 up to 7 + 15. The robotic narration for the equations contrasts with the melodic chorus, creating a distinct auditory pattern that aids in retention and recall. The core theme is building arithmetic fluency through repetition and rhythm. The video breaks the addition table into manageable chunks, interspersed with a chorus that allows students a mental break and a chance to move or dance. This structure supports the cognitive load associated with rote memorization, transforming a typically dry drill exercise into an engaging auditory experience. Teachers can utilize this video as a warm-up activity, a transition tool, or a background track for independent math stations. Its primary educational value lies in supporting mental math strategies and automaticity. By internalizing these specific number bonds, students can free up working memory for more complex mathematical tasks in the future. The song is particularly effective for auditory learners and active students who benefit from incorporating movement into their learning process.

Have Fun TeachingHave Fun Teaching

2mins 20s

Video
Mastering Operations with Integers: Add, Subtract, Multiply, and Divide

Mastering Operations with Integers: Add, Subtract, Multiply, and Divide

This comprehensive mathematics video serves as a complete guide to performing the four fundamental operations—addition, subtraction, multiplication, and division—with integers. The video uses a clear, step-by-step approach led by an animated teacher avatar who explains both the procedural rules and the conceptual reasoning behind them. It breaks down each operation into distinct segments, providing multiple methods for solving problems, including symbolic notation, number lines, and visual counters (manipulatives). The video explores key themes such as the concept of "zero pairs" when adding or subtracting positive and negative numbers, moving left or right on a number line, and the relationship between subtraction and adding the additive inverse. It explicitly defines mathematical vocabulary like minuend, subtrahend, dividend, and divisor. The content addresses common stumbling blocks, such as subtracting a larger number from a smaller one or subtracting negative numbers, by visualizing these processes with red (negative) and green (positive) counters. For educators, this video is a versatile classroom tool that supports differentiated instruction. The visual models (counters and number lines) are excellent for helping students who struggle with abstract rules grasp the "why" behind integer operations. Teachers can use specific segments to introduce a single operation or use the entire video as a review unit. The clear summary of rules at the end provides a perfect anchor chart for students to copy into their notes, making it valuable for both initial instruction and test preparation.

Sheena DoriaSheena Doria

20mins 42s