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Use base ten blocks to construct two- and three-digit numbers on a place value board. Then, play a game using base ten blocks to model numbers up to 100.
Lesson Plan
Grades: PreK to 2nd, Pre K to 2nd
Number & Operations
Algebraic Thinking
Use place value understanding and properties of operations to add and subtract.
Understand place value.
Understand addition as putting together and adding to, and understand subtraction as taking apart and taking from.
K.OA.A.1, K.OA.A.2, 1.NBT.B.2a, 1.NBT.B.2b, 1.NBT.B.2c, 1.NBT.C.4, 2.NBT.A.1a, 2.NBT.B.5, 2.NBT.B.6, 2.NBT.B.7
Use operations to discover patterns with integers in magic squares.
Lesson Plan
Algebraic Thinking
Number & Operations
Use place value understanding and properties of operations to add and subtract.
Understand and apply properties of operations and the relationship between addition and subtraction.
Understand addition as putting together and adding to, and understand subtraction as taking apart and taking from.
K.OA.A.5, 1.OA.B.4, 1.OA.C.6, 1.NBT.C.4, 2.OA.B.2

Use concepts of greater than, less than and equal to by observing quantities and making comparisons.

Grades: PreK to 2nd, Pre K to 2nd
Number & Operations
Algebraic Thinking
Counting & Cardinality
Understand place value.
Work with addition and subtraction equations.
Compare numbers.
Count to tell the number of objects.
Know number names and the count sequence.
K.CC.A.2, K.CC.B.4c, K.CC.C.6, K.CC.C.7, 1.OA.D.7, 1.NBT.B.3, 2.NBT.A.4
Students use pictures and symbolic letters to represent (in)equality and variables in an equation.
Lesson Plan
Number & Operations
Algebraic Thinking
Counting & Cardinality
Understand place value.
Work with addition and subtraction equations.
Work with numbers 11-19 to gain foundations for place value.
Understand addition as putting together and adding to, and understand subtraction as taking apart and taking from.
Compare numbers.
K.CC.C.6, K.CC.C.7, K.OA.A.3, K.OA.A.4, K.NBT.A.1, 1.OA.D.7, 1.NBT.B.3, 2.NBT.A.4
Observe the properties and classification of objects to build ideas about variables.
Lesson Plan
Grades: PreK to 2nd, Pre K to 2nd
Measurement & Data
Represent and interpret data.
Classify objects and count the number of objects in each category.
K.MD.B.3, 1.MD.C.4
Explore the different addend pairs, and play a game to apply your understanding.
Lesson Plan
Number & Operations
Algebraic Thinking
Counting & Cardinality
Use place value understanding and properties of operations to add and subtract.
Work with addition and subtraction equations.
Understand and apply properties of operations and the relationship between addition and subtraction.
Work with numbers 11-19 to gain foundations for place value.
Understand addition as putting together and adding to, and understand subtraction as taking apart and taking from.
Count to tell the number of objects.
K.CC.B.4a, K.CC.B.4b, K.CC.B.5, K.OA.A.1, K.OA.A.2, K.OA.A.3, K.OA.A.4, K.OA.A.5, K.NBT.A.1, 1.OA.B.4, 1.OA.C.6, 1.OA.D.8, 1.NBT.C.4, 2.OA.B.2, 2.NBT.B.7
Learn how to estimate the size of a total population by taking samples and using proportions.
Lesson Plan
Grades: 6th to 8th, Pre K to 2nd
Stats & Probability
Ratio & Proportion
Measurement & Data
Use random sampling to draw inferences about a population.
Analyze proportional relationships and use them to solve real-world and mathematical problems.
Understand ratio concepts and use ratio reasoning to solve problems.
Represent and interpret data.
1.MD.C.4, 6.RP.A.3a, 7.RP.A.3, 7.SP.A.1, 7.SP.A.2

Count and subitize by playing a game.

This activity is available for your phone in the Android Market or Apple App Store.

Web Interactive
Measurement & Data
Counting & Cardinality
Relate addition and subtraction to length.
Count to tell the number of objects.
Know number names and the count sequence.
K.CC.A.2, K.CC.B.4a, K.CC.B.4b, K.CC.B.4c, K.CC.B.5, 2.MD.B.6
Create customized activity sheets for your classroom.
Web Interactive
Grades: High School, 6th to 8th, 3rd to 5th, PreK to 2nd, 9th to 12th, Pre K to 2nd
Functions
Geometry
The Number System
Num & Ops Fractions
Measurement & Data
Use functions to model relationships between quantities.
Solve real-world and mathematical problems involving area, surface area, and volume.
Apply and extend previous understandings of numbers to the system of rational numbers.
Graph points on the coordinate plane to solve real-world and mathematical problems.
Develop understanding of fractions as numbers.
Relate addition and subtraction to length.
Analyze, compare, create, and compose shapes.
Identify and describe shapes (squares, circles, triangles, rectangles, hexagons, cubes, cones, cylinders, and spheres).
K.G.A.2, K.G.B.4, 2.MD.B.6, 3.NF.A.2a, 3.NF.A.2b, 5.G.A.1, 6.NS.C.6c, 6.NS.C.7a, 6.G.A.4, 8.F.B.5, HSF-LE.A.1b
Count, add, and subtract by grouping cows.
Web Interactive
Grades: Pre K to 2nd, PreK to 2nd
Number & Operations
Algebraic Thinking
Counting & Cardinality
Understand place value.
Use place value understanding and properties of operations to add and subtract.
Understand and apply properties of operations and the relationship between addition and subtraction.
Understand addition as putting together and adding to, and understand subtraction as taking apart and taking from.
Count to tell the number of objects.
Know number names and the count sequence.
K.CC.A.1, K.CC.B.4a, K.CC.B.4b, K.CC.B.5, K.OA.A.1, K.OA.A.2, K.OA.A.5, 1.OA.B.4, 1.OA.C.6, 1.NBT.C.4, 2.OA.B.2, 2.NBT.B.7, 2.NBT.A.2

Become proficient with numbers and operations by guiding Okta the octopus through a mathematical maze.

Web Interactive
Grades: 3rd to 5th, 6th to 8th, PreK to 2nd, Pre K to 2nd
Num & Ops Fractions
The Number System
Num & Ops Base Ten
Expression/Equation
Algebraic Thinking
Number & Operations
Apply and extend previous understandings of multiplication and division to multiply and divide fractions.
Apply and extend previous understandings of operations with fractions to add, subtract, multiply, and divide rational numbers.
Use equivalent fractions as a strategy to add and subtract fractions.
Compute fluently with multi-digit numbers and find common factors and multiples.
Apply and extend previous understandings of multiplication and division to divide fractions by fractions.
Perform operations with multi-digit whole numbers and with decimals to hundredths.
Build fractions from unit fractions by applying and extending previous understandings of operations on whole numbers.
Use place value understanding and properties of operations to perform multi-digit arithmetic.
Solve real-life and mathematical problems using numerical and algebraic expressions and equations.
Multiply and divide within 100.
Use place value understanding and properties of operations to add and subtract.
Understand and apply properties of operations and the relationship between addition and subtraction.
Understand addition as putting together and adding to, and understand subtraction as taking apart and taking from.
K.OA.A.5, 1.OA.B.4, 1.OA.C.6, 1.NBT.C.4, 2.OA.B.2, 2.NBT.B.5, 2.NBT.B.6, 2.NBT.B.7, 2.NBT.B.9, 3.OA.C.7, 3.NBT.A.2, 4.NBT.B.4, 4.NBT.B.5, 5.NF.B.4a, 5.NF.B.4b, 7.NS.A.3, 7.EE.B.3, 4.NBT.B.6, 4.NF.B.3a, 4.NF.B.3d, 5.NBT.B.7, 6.NS.A.1, 6.NS.B.3, 7.NS.A.2a, 5.NF.A.1, 7.NS.A.2c, 5.NF.B.6
Practice counting and adding by 10s.
Web Interactive
Grades: PreK to 2nd, Pre K to 2nd
Algebraic Thinking
Number & Operations
Counting & Cardinality
Use place value understanding and properties of operations to add and subtract.
Understand and apply properties of operations and the relationship between addition and subtraction.
Understand addition as putting together and adding to, and understand subtraction as taking apart and taking from.
Count to tell the number of objects.
Know number names and the count sequence.
K.CC.A.2, K.CC.B.4a, K.CC.B.4b, K.CC.B.4c, K.CC.B.5, K.OA.A.1, K.OA.A.2, K.OA.A.5, 1.OA.B.4, 1.OA.C.6, 1.NBT.C.4, 2.OA.B.2

By yourself or against a friend, match whole numbers, shapes, fractions, or multiplication facts to equivalent representations. Practice with the clear panes or step up the challenge with the windows closed.

This activity is now available for your phone or tablet in Google Play or App Store.

Web Interactive
Grades: 3rd to 5th, Pre K to 2nd, PreK to 2nd
Num & Ops Fractions
Measurement & Data
Geometry
Algebraic Thinking
Num & Ops Base Ten
Number & Operations
Apply and extend previous understandings of multiplication and division to multiply and divide fractions.
Geometric measurement: understand concepts of area and relate area to multiplication and to addition.
Reason with shapes and their attributes.
Work with equal groups of objects to gain foundations for multiplication.
Classify two-dimensional figures into categories based on their properties.
Build fractions from unit fractions by applying and extending previous understandings of operations on whole numbers.
Use place value understanding and properties of operations to perform multi-digit arithmetic.
Generalize place value understanding for multi-digit whole numbers.
Develop understanding of fractions as numbers.
Multiply and divide within 100.
Understand place value.
Analyze, compare, create, and compose shapes.
Identify and describe shapes (squares, circles, triangles, rectangles, hexagons, cubes, cones, cylinders, and spheres).
K.G.A.2, K.G.B.4, 2.NBT.A.3, 2.G.A.1, 3.OA.C.7, 3.NF.A.1, 3.NF.A.3c, 3.G.A.2, 4.NBT.A.2, 4.NBT.B.5, 4.NF.B.4a, 5.G.B.3, 5.G.B.4, 1.G.A.3, 2.OA.C.4, 2.G.A.2, 2.G.A.3, 3.MD.C.7b, 5.NF.B.3
Draw, color, paste, slice, rotate, reflect, expand, and contract various shapes.
Grades: 6th to 8th, 3rd to 5th, PreK to 2nd, Pre K to 2nd
Geometry
Draw construct, and describe geometrical figures and describe the relationships between them.
Reason with shapes and their attributes.
Analyze, compare, create, and compose shapes.
K.G.B.4, K.G.B.5, K.G.B.6, 1.G.A.1, 1.G.A.2, 2.G.A.1, 7.G.A.2
Practice counting and adding by 5s.
Web Interactive
Grades: PreK to 2nd, Pre K to 2nd
Algebraic Thinking
Number & Operations
Counting & Cardinality
Use place value understanding and properties of operations to add and subtract.
Understand and apply properties of operations and the relationship between addition and subtraction.
Understand addition as putting together and adding to, and understand subtraction as taking apart and taking from.
Count to tell the number of objects.
Know number names and the count sequence.
K.CC.A.2, K.CC.B.4a, K.CC.B.4b, K.CC.B.4c, K.CC.B.5, K.OA.A.1, K.OA.A.2, K.OA.A.5, 1.OA.B.4, 1.OA.C.6, 1.NBT.C.4, 2.OA.B.2
Manipulate various geometric solids and investigate their properties.
Web Interactive
Grades: High School, 6th to 8th, 3rd to 5th, PreK to 2nd, Pre K to 2nd
Geometry
Solve real-world and mathematical problems involving area, surface area, and volume.
Analyze, compare, create, and compose shapes.
Identify and describe shapes (squares, circles, triangles, rectangles, hexagons, cubes, cones, cylinders, and spheres).
K.G.A.2, K.G.B.4, 6.G.A.4
Learn a fun and impressive trick while simultaneously practicing and mastering the all-important combinations of ten.
Lesson Plan
Number & Operations
Algebraic Thinking
Use place value understanding and properties of operations to add and subtract.
Understand and apply properties of operations and the relationship between addition and subtraction.
Work with numbers 11-19 to gain foundations for place value.
Understand addition as putting together and adding to, and understand subtraction as taking apart and taking from.
K.OA.A.3, K.OA.A.4, K.OA.A.5, K.NBT.A.1, 1.OA.B.4, 1.OA.C.6, 2.OA.B.2, 2.NBT.B.5, 2.NBT.B.6, 2.NBT.B.7, 2.NBT.B.9
Use the book, A Remainder of One by Elinor J. Pinczes, to introduce division with remainders.
Lesson Plan
Grades: PreK to 2nd, 3rd to 5th, Pre K to 2nd
Algebraic Thinking
Number & Operations
Gain familiarity with factors and multiples.
Use the four operations with whole numbers to solve problems.
Solve problems involving the four operations, and identify and explain patterns in arithmetic.
Multiply and divide within 100.
Represent and solve problems involving multiplication and division.
Use place value understanding and properties of operations to add and subtract.
1.NBT.C, 3.OA.A.2, 3.OA.A.3, 3.OA.C.7, 3.OA.D.8, 4.OA.A.2, 4.OA.A.3, 4.OA.B.4
Use models to practice regrouping and to reinforce place value understanding.
Lesson Plan
Grades: 3rd to 5th, Pre K to 2nd
Num & Ops Base Ten
Number & Operations
Algebraic Thinking
Understand the place value system.
Use place value understanding and properties of operations to perform multi-digit arithmetic.
Generalize place value understanding for multi-digit whole numbers.
Use place value understanding and properties of operations to add and subtract.
Understand place value.
Understand addition as putting together and adding to, and understand subtraction as taking apart and taking from.
K.OA.A.1, K.OA.A.2, 1.NBT.B.2a, 1.NBT.B.2b, 1.NBT.B.2c, 1.NBT.C.4, 2.NBT.A.1a, 2.NBT.B.5, 2.NBT.B.6, 2.NBT.B.7, 3.NBT.A.2, 4.NBT.A.1, 4.NBT.B.4, 5.NBT.A.1
Use snap cubes or grid paper to build numbers in two columns to show whether they are odd or even.
Lesson Plan