See how math works ...

Explore expressions with set models, use number lines to understand fractions.

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Set Model for Expressions

Visualize expressions involving addition and multiplication. Click and drag to explore or type something new.

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Number Line for Fractions

Represent one segment in terms of the other. Partition and iterate, zoom and align.

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Addition with Number Lines

Use two number lines to visualize addition. Partition the partition to add fractions with different denominators.

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Multiplication with Number Lines

Use two number lines to visualize multiplication. See why multiplying fractions less than one makes the product smaller than the original factors.



External Resources

Graspable Math

Move terms fluently to solve equations and explore the power of algebra without the frustration!