: Our own set of virtual flash cards as a fun way to improve calculation speed and accuracy.
Some more of our own
Talk on Phyllotaxis
Irrationality of the square root of 2
: Generates personal wallpaper patterns with any of the 17 possible symmetry groups.
: A game based on Sierpinski's Gasket that is fun to play and develops concepts of distance and logical analysis.
: A wonderful collection of interactive java applets from Japan. There is little documentation, but teachers can find useful tools for illustrating many concepts.
The Prime Pages
: Information on prime numbers.
Keith Taylor's homepage