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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.
FunctionMatching
Algebra

Function Matching

9-12
See how well you understand function expressions by trying to match your function graph to a generated graph. Choose from several function types or select random and let the computer choose.
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.
GroupingAndGrazing ICON
Number and Operations

Grouping and Grazing

Pre-K-2
Help the alien spaceship move cows into corrals by counting, adding, and subtracting. This activity helps children learn grouping, tally marks, and place value.
OktasRescue
Number and Operations

Okta's Rescue

Pre-K-2

Practice counting and subitizing by playing this game (also available on iOS and Android).

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.
RandomDrawingToolIndividualTrials
Data Analysis and Probability

Random Drawing Tool - Individual Trials

9-12
Explore the relationship between theoretical and experimental probabilities.
TessellationCreator
Geometry

Tessellation Creator

3-5, 6-8
Use this applet to create patterns to cover the screen using regular polygons.