
 Math Cats
Math Cats promotes creative, openended 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, hexagonshaped fact family cards, idea banks for teachers and parents, and much more.
http://www.mathcats.com

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.
http://www.wmeadow.demon.co.uk/poly/index.htm

Bruce Bukiet's Homepage
description of Prof. Bukiet's work including math modeling of baseball and math tricks.
m.njit.edu/~bukiet

MathPro Online: Online Reference to Mathematical Problems
database currently contains 20,945 math problems from 38 journals and 21 contests
http://problems.math.umr.edu/index.htm

Flexagons
Includes a definition of the word, instructions on how to make a Trihexaflexagon, how to flex it and information about it and another flexagon.
http://www.mathematischebasteleien.de/flexagons.htm

Tiling and Packing Results of Torsten Sillke
Polyominoes, polycubes and polyspheres.
http://www.mathematik.unibielefeld.de/~sillke/results.html

Mathematics Archives
links to contests, problem sets, journals sites.
http://archives.math.utk.edu/contests

Franklin's Magic Squares
Covers how Franklin constructed his magic squares including a autobiographical extract.
http://mathpages.com/home/kmath155.htm

Java Penrose Tiler
A Java applet for experimenting with kites and darts.
http://www.geocities.com/SiliconValley/Pines/1684/Penrose.ht...


