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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.
PiFight ICON
Geometry

Pi Fight

6-8, 9-12

Become comfortable with using both radians and degrees. 

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.
ShapeTool
Geometry

Shape Tool

Pre-K-2, 3-5, 6-8
This tool allows you to create any geometric shape imaginable. Squares, triangles, rhombi, trapezoids and hexagons can be created, colored, enlarged, shrunk, rotated, reflected, sliced, and glued together.
TessellationCreator
Geometry

Tessellation Creator

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

Area of Triangles

3-5, 6-8

To find the area of a triangle, try to make a parallelogram using a copy of the triangle.

Handshakes ICON
Data Analysis and Probability

Handshakes

3-5, 6-8

When the nine justices of the Supreme Court meet, they greet one another with a handshake to show harmony of purpose, even though their views may differ. How many handshakes occur? In general, how many handshakes occur when there are n people?

IsoscelesTriangleArea ICON
Geometry

Isosceles Triangle Area

6-8
Explore when an isosceles triangle obtains its maximum area.
ProofWithoutWordsPythagoreanTheorem
Geometry

Proof Without Words: Pythagorean Theorem

6-8
This applet proves the Pythagorean Theorem "without words" using geometry.
PythagoreanReview ICON
Geometry

Pythagorean Review

6-8

Review and explore the Pythagorean Theorem.