Lenny LearningLenny
Create
Explore
Workspace
LoginSign up
MathEnglish Language ArtsScience & EngineeringSocial StudiesGlobal LanguagesHealth & Physical EducationSpecial EducationCounseling & Life SkillsArts & CreativityESL
Lenny LearningLenny
Lenny Learning
About
Training
Pricing
Support
Contact
© 2026 Lenny Learning Inc.

Math

Math

Quantitative reasoning and logical structures across arithmetic, geometry, and advanced analysis. Builds problem-solving skills through pattern recognition and modeling.

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
Fractions & DecimalsFoundational fraction equivalence, ordering, and operations across the rational number system. Addresses multi-digit computation, decimal conversions, and the distinction between rational and irrational numbers.

Building Fractions

Part-whole relationships, unit fractions, and numerator-denominator identification. Develops foundational understanding through visual area models, sets, and number line representations.

88804275135
Statistics & ProbabilityData representation, distributions, and statistical variability using sampling and inference techniques. Integrates probability models, compound events, bivariate patterns, and linear models to guide data-driven decision making.

Represent and Interpret Data

Categorical and numerical data organization using tally charts, pictographs, and bar graphs. Focuses on interpreting visual displays to solve comparison problems and summarize data sets.

3421870110
Numbers & CountingOne-to-one correspondence, numeral identification, and comparison of quantities using terms like greater than or less than. Establishes the foundation for numerical literacy and early arithmetic operations.

Number Names

Identification and spelling of number words from zero through millions. Connects numerical symbols to their written linguistic representations to strengthen mathematical literacy.

58496160447

Comparing Numbers

Mathematical symbols including greater than (>), less than (<), and equal to (=) to evaluate numerical relationships. Builds fluency in ordering sets and comparing quantities from single digits to multi-digit integers.

92817246324
Measurement & DataDevelops proficiency in estimating and measuring length, area, volume, and mass using standard units and unit conversions. Integrates time, money, angle measurement, and data classification through counting and arithmetic applications.

Measurable Attributes

Identification and comparison of length, weight, and capacity through direct observation. Builds foundational vocabulary for describing and ordering objects based on their physical properties.

72532146916

Measuring Lengths

Standard and non-standard units for determining length, width, and height across metric and customary systems. Develops skills in precise tool usage, estimation techniques, and unit conversions.

2171546490249

Measure and Estimate Lengths in Standard Units

Selection and use of standard measuring tools including rulers, yardsticks, and meter sticks. Develops skills in estimating and accurately measuring lengths in both customary and metric systems.

77558175810

Relate Addition and Subtraction to Length

Measurement word problems and number line diagrams representing sums and differences of lengths. Equips learners to use addition and subtraction for solving real-world scenarios involving inches, feet, or centimeters.

43339115715

Time and Money

Analog and digital clock reading, elapsed time calculations, and calendar skills. Strengthens currency identification, coin counting, and basic financial transactions.

75743244155

Area Concepts and Measurement

Square units, tiling, and formulas for calculating surface space in two-dimensional polygons. Connects linear measurements to area calculations through practical geometric applications.

2301640500271

Time, Volume, and Mass

Measurement of elapsed time intervals on analog and digital clocks alongside units for capacity and weight. Develops skills in estimating and measuring liquid volumes in liters and solid mass in grams or kilograms.

1381133351668
GeometryGeometric classification, measurement of area and volume, and the study of transformations and rigid motions. Builds toward complex proofs, trigonometry for general triangles, and the algebraic representation of conic sections.

Identifying Shapes

Visual recognition and naming of two-dimensional and three-dimensional geometric figures. Builds classification skills based on properties such as sides, vertices, and curves.

1881142352134

Shapes and Attributes

Properties of two-dimensional and three-dimensional geometric figures, focusing on sides, angles, and vertices. Strengthens spatial awareness through classification and construction activities.

2341523479444

Shape Attributes and Reasoning

Identification of properties including sides, vertices, and angles in two-dimensional and three-dimensional shapes. Classifies and sorts objects based on shared attributes to build foundational geometric reasoning.

2121436439440

Shapes and Composition

Identification of 2D and 3D shapes alongside their defining attributes like sides, angles, and vertices. Builds spatial reasoning by composing simple shapes into complex figures and decomposing larger objects into constituent parts.

146939296729

Classifying 2D Figures

Categorizes polygons based on side lengths, angle measures, and the presence of parallel or perpendicular lines. Distinguishes between subcategories of quadrilaterals and triangles using hierarchical relationships.

100668211035

Geometric Figures and Relationships

Properties of 2D and 3D shapes, including symmetry, congruence, and similarity. Develops spatial reasoning through the study of angles, lines, and coordinate transformations.

3282246720093

Lines, Angles, and Shapes

Geometric foundations including parallel and perpendicular lines, angle classification, and the properties of two-dimensional polygons. Strengthens spatial reasoning through the identification of vertices, edges, and symmetry.

14412354214108

Geometric Measurement

Area, perimeter, and volume calculations for two- and three-dimensional figures. Develops spatial reasoning through the application of measurement formulas and unit conversions.

30222256944116
Number OperationsCounting 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.

Counting Sequence

Sequential number naming and cardinal counting principles for early learners. Develops fluency in forward and backward sequences while introducing skip-counting patterns.

1251083368982

Place Value Understanding and System

Positional notation and relationships between digits in the base-ten system. Strengthens skills in regrouping, estimation, and comparing magnitudes of whole numbers and decimals.

19422398174177

Add and Subtract Within 20

Addition and subtraction strategies for numbers up to 20, including regrouping and word problem applications. Strengthens mental math skills and builds fluency with basic facts.

1301587591097

Addition and Subtraction Concepts

Mental math strategies, regrouping techniques, and the inverse relationship between operations. Builds computational fluency through visual models, number lines, and real-world word problems.

346351012418242

Addition and Subtraction Equations

Solving single-step equations using inverse operations to isolate variables. Connects basic arithmetic to algebraic reasoning through balanced equations and word problem applications.

22321287303115

Addition and Subtraction Problems

One- and two-step word problems involving joining, separating, and comparing quantities. Develops strategies for modeling operations and understanding the inverse relationship between addition and subtraction.

2542109711384

Foundations for Multiplication

Equal groups, repeated addition, and array structures for early learners. Connects skip counting to multiplication concepts through visual models and concrete examples.

71727236849

Multiplication and Division Problems

Multi-step word problems involving equal groups, arrays, and area models. Strengthens computational fluency and the ability to interpret remainders in real-world contexts.

1671571531383

Properties of Operations

Commutative, associative, and distributive properties for addition and multiplication. Develops mental math strategies and provides the foundation for algebraic manipulation.

296319211038147

Patterns and Relationships

Identification, 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.

1851473468756

Place Value Operations

Multi-digit arithmetic strategies using base-ten blocks, area models, and regrouping. Connects concrete representations to standard algorithms for addition, subtraction, multiplication, and division.

21622398055167

Four Operations Problem Solving

Addition, subtraction, multiplication, and division applications within complex word problems. Strengthens the ability to translate scenarios into mathematical equations and execute multi-step solutions.

2731821587946