Algebra Balance Scales - Solve simple linear equations using a balance beam representation.

Algebra Balance Scales - Negatives - Solve simple linear equations using a balance beam representation.

Algebra Tiles - Visualize multiplying and factoring algebraic expressions using tiles.

Base Blocks - Illustrate addition and subtraction in a variety of bases.

Coin Problem - Use deduction to find the counterfeit coin.

Fifteen Puzzle - Solve this virtual version of the classical fifteen puzzle by arranging its tiles.

Function Machine - Explore the concept of functions by putting values into this machine and observing its output.

Grapher - A tool for graphing and exploring functions.

Pattern Blocks - Use six common geometric shapes to build patterns and solve problems.

Peg Puzzle - Win this game by moving the pegs on the left past the pegs on the right.

Pentominoes - Use the 12 pentomino combinations to solve problems.

Polyominoes - Build and compare characteristics of biominoes, triominoes, quadrominoes, etc.

Stick or Switch - Investigate probabilities of sticking with a decision, or switching.

Towers of Hanoi - Solve the tower problem and test your theory by varying the number of disks.