Lenny.com
Explore
Create
ActivitiesNewMathEnglish Language ArtsScience & EngineeringSocial StudiesGlobal LanguagesHealth & Physical EducationSpecial EducationCounseling & Life SkillsArts & CreativityESL
Lenny.com
Lenny.com
Explore
Create
ActivitiesNewMathEnglish Language ArtsScience & EngineeringSocial StudiesGlobal LanguagesHealth & Physical EducationSpecial EducationCounseling & Life SkillsArts & CreativityESL
Lenny.com
Lenny.com

Solutions

Lenny for EducatorsLenny for SchoolsLenny for Districts

Product

ExploreSign inCreateSupportAbout

Resources

Getting startedMTSS Acceleration Program

© 2026 Lenny Learning Inc.

TermsPrivacyAccessibility
LinkedInInstagramX
Lenny
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

Elementary Skills Lab

A foundational elementary curriculum covering progressive multi-digit mathematics operations and early literacy grammar and phonics analysis.

JMJennifer Murphy
Regrouping Realm

A scaffolded multi-digit subtraction unit focusing on regrouping strategies, place value alignment, and borrowing across zeros from 2-digit to 4-digit numbers.

Sentence Detectives

An early literacy grammar module focused on dissecting decodable sentences to identify, color-code, and classify nouns and descriptive adjectives.

Elementary Skills Lab

A foundational elementary curriculum covering progressive multi-digit mathematics operations and early literacy grammar and phonics analysis.

JMJennifer Murphy

You might also like

Roll and Multiply Slides

Fact Master Quest

A comprehensive 3-day instructional sequence designed to build fluency in single-digit multiplication facts from 1 to 10. Students progress from experiential dice rolling and array modeling to systematic 10x10 chart mapping, culminating in flashcard fabrication and timed partner drills.

AA

alicia accapezzato

9
Cross-Cross Combine Divide Worksheet

Cross-Cross Equations

Algebra 1 lesson covering solving multi-step linear equations using the Cross-Cross, Combine and Divide method with visual boxes and circles.

H

Harlston

3
Spanish Cross Cross Worksheet

Spanish Cross Cross Worksheet

Spanish version of the two-page Algebra 1 warm-up worksheet 'Cruza, Combina y Divide' for October 21st. The front page guides students through solving the equation with the straight crossing arrows method and student header, while the back page provides practice simplifying both expressions using the boxes and circles strategy with TI-Nspire verification.

H

Harlston

Ten Frame Slides

Target Ten

A foundational math sequence engineered to build addition fluency to 10 through concrete ten-frame modeling, number path navigation, and missing addend investigations. Designed with visual scaffolds and structured repetition for students needing extra support.

Lenny Avatar
Lenny
9
Triangle Similarity & Angle Review

Angle Explorers

An 8th grade geometry lesson exploring angle-angle triangle similarity, the exterior angle theorem, and angle relationships formed by parallel lines cut by transversals.

L

Logan-Greene

2
Cross-Cross Equations Answer Key

Cross-Cross Equations Answer Key

Comprehensive two-page teacher answer key for the Cross-Cross, Combine and Divide warm-up worksheet. Shows full step-by-step solutions, intermediate distribution steps, box and circle values, sign flips, combined terms, golden step division, and TI-Nspire verification results.

H

Harlston

Grid Blueprint Lesson Plan

Dimension Architects

A coherent spatial measurement sequence bridging two-dimensional surface coverage to three-dimensional volume measurement. Students transition from tiling flat regions with unit squares to packing solid rectangular prisms with unit cubes, connecting spatial arrays to multiplicative formulas.

MJ

Meg Jones

8
Cutout Area Practice Worksheet

Cutout Area Detectives

A 3rd-grade math lesson on calculating the area of composite figures using the subtraction strategy (finding total area of the large rectangle and subtracting the cut-out missing piece).

SM

Samantha McBath

2
Triangle Similarity & Angle Review Answer Key

Triangle Similarity & Angle Review Answer Key

A comprehensive 2-page print-ready teacher answer key and scoring guide for the Angle Quest Worksheet. Features fully worked-out step-by-step solutions, completed diagrams with highlighted answers, common student misconceptions, and scoring tips.

L

Logan-Greene

Problem Detective Assessment

Math Goal Mastery

A targeted sequence of progress monitoring assessments and evaluation guides designed to measure and document key IEP mathematics benchmarks, including multi-step word problems and multi-digit operations.

JD

Jenny Daniels

4
Times Table Reference Chart

Multiplication Mastery

A foundational collection of multiplication reference charts and skip-counting tools designed to build fact fluency from 1 to 15.

TP

Trinity Peters

3
Cross-Cross Combine Divide Worksheet

Cross-Cross Combine Divide Worksheet

Two-page Algebra 1 warm-up worksheet for October 21st titled 'Cross-Cross, Combine and Divide' for solving linear equations. The front page guides students through the three-step method (cross-cross with straight directional arrows, combine like terms, and divide by the coefficient) on the full equation, while the back page provides practice simplifying both expressions.

H

Harlston