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CoinBox
Number and Operations

Coin Box

Pre-K-2, 3-5
Learn how to count, collect, exchange, and make change for coins by manipulating coins using an array representation.
DynamicPaper ICON
Data Analysis and Probability

Dynamic Paper

Pre-K-2, 3-5, 6-8, 9-12

Need a pentagonal pyramid that's six inches tall? Or a number line that goes from ‑18 to 32 by 5's? You can create all those things and more! Place the images you want, then export it as a PDF or as a JPG image.

Factorize
Number and Operations

Factorize

3-5, 6-8
Dividing Numbers into Two Factors and Building Arrays to Represent Each Factorization
FractionModels
Number and Operations

Fraction Models

3-5, 6-8
Explore different representations for fractions including improper fractions, mixed numbers, decimals, and percentages. Additionally, there are length, area, region, and set models.
GeometricSolids
Geometry

Geometric Solids

Pre-K-2, 3-5, 6-8, 9-12
This tool allows you to manipulate various geometric solids and investigate their properties.
PanBalanceExpressions
Algebra

Pan Balance – Expressions

3-5, 6-8, 9-12
Using this interactive tool, you can practice arithmetic and algebraic skills, and investigate the important concept of equivalence.
PanBalanceNumbers
Algebra

Pan Balance – Numbers

3-5, 6-8
Use this tool to strengthen understanding and computation of numerical expressions and equality using a balance scale.
PanBalanceShapes
Algebra

Pan Balance – Shapes

3-5, 6-8
Use this tool to build up to algebraic thinking by exploring how to balance shapes of unknown weight.
TessellationCreator
Geometry

Tessellation Creator

3-5, 6-8
Use this applet to create patterns to cover the screen using regular polygons.
AdjustableSpinner
Data Analysis and Probability

Adjustable Spinner

Pre-K-2, 3-5, 6-8, 9-12
Use this tool to create a spinner to examine experimental and theoretical outcomes.