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.
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

Math

Math

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

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
AlgebraTechniques for manipulating polynomial operations, rational expressions, and complex numbers alongside strategies for solving systems of equations and inequalities. Develops quantitative reasoning through graphing, real-world modeling, and the structural analysis of algebraic identities.

Quantitative Relationships

Ratios, proportions, and rate of change within mathematical and real-world contexts. Connects algebraic expressions to tabular and graphical representations of how variables interact.

38726378237132
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.

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.

2171546490449

Time and Money

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

75744244955

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

Perimeter and Area Measures

Formulas and strategies for calculating the boundary length and interior space of two-dimensional shapes. Develops skills in measuring polygons, circles, and composite figures through standard units and real-world applications.

2231610496575

Angle Concepts and Measurement

Identification and measurement of acute, obtuse, right, and straight angles using a protractor. Builds proficiency in geometric relationships, including complementary and supplementary angles.

4532195622

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

Measurement Unit Conversions

Mathematical processes for switching between metric and customary units of length, mass, and volume. Emphasizes conversion factors, dimensional analysis, and real-world application.

73634194237
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.

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.

2341524480244

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

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

Angle, Area, and Volume

Geometric properties including angle measurement, area of polygons, and volume of three-dimensional solids. Applies formulas and theorems to solve spatial reasoning problems.

1651458476894

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

Volume of 3D Shapes

Formulas and calculations for determining the capacity of prisms, pyramids, cylinders, cones, and spheres. Develops spatial reasoning through applications involving cubic units and composite solids.

115764231337

Coordinate Plane Applications

Quadrant navigation, distance calculations between points, and area determinations for polygons. Applies coordinate geometry to mapping, reflections, and data visualization.

1441009328648

Volume Formulas

Geometric calculations for three-dimensional shapes including prisms, cylinders, pyramids, cones, and spheres. Develops skills for solving missing dimensions and real-world capacity problems.

134889268739
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.

Fractions as Numbers

Numerical representation of parts of a whole and location on number lines. Develops understanding of fraction magnitude, equivalence, and the relationship between numerators and denominators.

1221121392153

Building Fractions

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

88804275135

Fraction Equivalence and Ordering

Visual models, common denominators, and benchmark fractions to compare and order values. Develops methods for identifying equivalent fractions and placing fractional numbers on a number line.

1271116379876

Adding and Subtracting Fractions

Calculation methods for fractions with like and unlike denominators using least common multiples. Covers regrouping with mixed numbers and simplifying final sums and differences.

81834306077

Multiplying and Dividing Fractions

Algorithmic procedures for multiplying and dividing proper, improper, and mixed fractions. Connects visual area models to standard calculations and the use of reciprocals.

112944320770

Dividing Fractions

Reciprocal operations, visual modeling, and the standard algorithm for dividing proper fractions and mixed numbers. Connects inverse operations to real-world division scenarios and word problems.

72574192935

Decimal Fractions

Equivalency between fractions with denominators of 10 or 100 and their decimal representations. Targets place value understanding, number line positioning, and basic operations with tenths and hundredths.

10113395091138

Multi-Digit Computation and Factors

Standard algorithms for multi-digit multiplication and long division alongside prime factorization, GCF, and LCM. Strengthens computational fluency with decimal operations across all four basic functions.

9313714929190

Add, Subtract, Multiply, and Divide Rational Numbers

Arithmetic operations including addition, subtraction, multiplication, and division of positive and negative fractions and decimals. Integrates strategies for common denominators, reciprocal multiplication, and precise decimal alignment.

17618986890187

Rational Number System

Classification and representation of integers, fractions, and terminating or repeating decimals on the number line. Examines the relationships between subsets of real numbers and techniques for comparing and ordering rational values.

1431158397255
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.

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

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.

22421297316115

Multiplication and Division Properties

Commutative, associative, and distributive properties alongside the inverse relationship between multiplication and division. Builds mental math fluency and prepares students for algebraic manipulation.

1051201405472

Multiply and Divide Within 100

Multiplication and division fluency within 100 using arrays, equal groups, and number lines. Connects inverse operations and properties of arithmetic to solve one- and two-step word problems.

1371309437360

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.

1681572532683

Factors and Multiples

Prime and composite numbers, divisibility rules, and the relationship between multiplication and division. Strengthens skills in identifying greatest common factors and least common multiples for fraction operations.

608713277118

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

Generate and Analyze Patterns

Numerical and geometric sequence identification using explicit rules. Builds algebraic reasoning through the analysis of term-to-term relationships and coordinate plane representations.

2091624525342

Multi-Digit Arithmetic

Addition, subtraction, multiplication, and division involving multi-digit integers and decimals. Strengthens proficiency in place value, regrouping, and standard algorithms.

333351812708251

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

Multi-Digit and Decimal Operations

Standard algorithms for multi-digit addition, subtraction, multiplication, and division. Applies place value logic to decimal calculations, including regrouping and precise point placement.

21723428446249

Numerical Expressions

Evaluates multi-step mathematical statements using the order of operations. Includes the use of parentheses, brackets, and braces to structure calculations and represent relationships between numbers.

322302410325178

Four Operations and Patterns

Multi-digit addition, subtraction, multiplication, and division strategies paired with identifying numerical patterns. Strengthens algebraic thinking through analysis of sequence rules and arithmetic relationships.

44354108213

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.

2741822589246