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ShapeCutter
Geometry

Shape Cutter

Pre-K-2, 3-5, 6-8, 9-12
With this tool, you can explore how to decompose shapes and recompose them to make other shapes. You can draw and cut shapes and also use slides, turns, and flips to move pieces around.
ScaleFactor
Geometry

Scale Factor

6-8, 9-12
Use this applet to investigate how changes in the scale factor influence the ratio of perimeters and the ratio of areas between two figures.
ProofWithoutWordsPythagoreanTheorem
Geometry

Proof Without Words: Pythagorean Theorem

6-8
This applet proves the Pythagorean Theorem "without words" using geometry.
ProofWithoutWordsCompletingTheSquare
Algebra

Proof Without Words: Completing the Square

9-12
This applet gives a proof of completing the square "without words" using geometry.
ProductGame
Number and Operations

Product Game

3-5, 6-8
This applet is the Product Game: a fun, interactive game that exercises your skill with factors and multiples.
PersonalNumber
Number and Operations

Personal Number

3-5, 6-8
Find your personal number using your birthday! It is the month + date + year & month × date × year.
PaperPool
Geometry

Paper Pool

3-5, 6-8, 9-12
This applet allows you to investigate the game of Paper Pool.
IGDAreas
Geometry

Interactive Geometry Dictionary: Areas in Geometry

3-5, 6-8
The applets in this Interactive Geometry Dictionary (IGD) will show you how to find the area of some common shapes: rectangles, triangles and parallelograms.
PickAPath
Measurement

Pick-a-Path

3-5, 6-8

Help Okta reach the target by choosing a path from the top of the maze to the bottom. Seven levels with seven puzzles will test your skills with powers of ten, negative numbers, fractions, decimals, and more. How many starfish can you earn?

PlotterPenguin
Geometry

Plotter the Penguin

3-5, 6-8

Learn how to use coordinates with Plotter the Penguin!