Attribute Trains - Learn about shape and color patterns of by completing trains of blocks.

Cob Web Plot - Change variables and observe patterns from this graphing simulation.

Congruent Triangles - Build similar triangles by combining sides and angles.

Fractals - Iterative - Generate six different fractals.

Fractals - Koch and Sierpinski - Change colors and pause this fractal simulation at any point.

Fractals - Mandelbrot and Julia Sets - Investigate relationships between these two fractal sets.

Fractals - Polygon - Change the parameters to create a new fractal.

Geoboard - Use geoboards to illustrate area, perimeter, and rational number concepts.

Geoboard - Circular - Use circular geoboards to illustrate angles and degrees.

Geoboard - Coordinate - Rectangular geoboard with x and y coordinates.

Geoboard - Isometric - Use geoboard to illustrate three-dimensional shapes.

Golden Rectangle - Illustrates iterations of the Golden Section.

Great Circle - Use a 3D globe to visualize and measure the shortest path between cities.

How High? - Try your hand at the classic Piagetian conservation of volume test.

Ladybug Leaf - Program a ladybug to hide behind a leaf.

Ladybug Mazes - Program a ladybug to move through a maze.

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

Pentominoes - Use the 12 pentomino combinations to solve problems.

Platonic Solids - Identify characteristics of the Platonic Solids.

Platonic Solids - Duals - Identify the duals of the platonic solids.

Platonic Solids - Slicing - Discover shapes and relationships between slices of the platonic solids.

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

Pythagorean Theorem - Solve two puzzles that illustrate the proof of the Pythagorean Theorem.

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

Tangrams - Use all seven Chinese puzzle pieces to make shapes and solve problems.

Tessellations - Using regular and semi-regular tessellations to tile the plane.

Tight Weave - Visualize the creation of the Sierpinski Carpet, an iterative geometric pattern that resembles a woven mat.

Transformations - Composition - Explore the effect of applying a composition of translation, rotation, and reflection transformations to objects.

Transformations - Dilation - Dynamically interact with and see the result of a dilation transformation.

Transformations - Reflection - Dynamically interact with and see the result of a reflection transformation.

Transformations - Rotation - Dynamically interact with and see the result of a rotation transformation.

Transformations - Translation - Dynamically interact with and see the result of a translation transformation.

Triominoes - Manipulate the puzzle pieces and find multiple solutions.

Turtle Geometry - Explore numbers, shapes, and logic by programming a turtle to move.