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

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

Color Patterns - Arrange colors to complete a pattern.

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

Grapher - A tool for graphing and exploring functions.

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

Pentominoes - Use the 12 pentomino combinations to solve problems.

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

Space Blocks - Create and discover patterns using three dimensional blocks.

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

Triominoes - Manipulate the puzzle pieces and find multiple solutions.

Turtle Rectangles - Change variables to observe differences in spiral designs.