- Math Cats
Math Cats promotes creative, open-ended explorations of math concepts through online and offline activities such as Tessellation Town, Polygon Playground, What a Crowd, Exploding Math Art, math crafts, story problems, hexagon-shaped fact family cards, idea banks for teachers and parents, and much more.
Martin's Pretty Polyhedra
What happens if numbers of similarly electrically charged, weightless particles are placed inside a glass sphere and come to equilibrium? This page shows the polyhedra resulting from a simulation of the system. Little more than the inverse square law is required. Some are familiar (tetrahedron, octahedron), many are not but still interesting.
Bruce Bukiet's Homepage
description of Prof. Bukiet's work including math modeling of baseball and math tricks.
MathPro Online: Online Reference to Mathematical Problems
database currently contains 20,945 math problems from 38 journals and 21 contests
Includes a definition of the word, instructions on how to make a Trihexaflexagon, how to flex it and information about it and another flexagon.
Tiling and Packing Results of Torsten Sillke
Polyominoes, polycubes and polyspheres.
links to contests, problem sets, journals sites.
Franklin's Magic Squares
Covers how Franklin constructed his magic squares including a autobiographical extract.
Java Penrose Tiler
A Java applet for experimenting with kites and darts.