National Library of Virtual Manipulatives: Lots of computer demonstration and games to illustrate math principles.   Solving Equations on Balance , basic level:   Solving Equations on Balance , level 2:   Link for Tic-Tac-Go   Special Numbers: This resource explains the many varieties of strange numbers in the world of mathematics.   Math Forum@Drexel University: Material and links on every aspect of mathematics.   Make a Snowflake   Online Scientific Calculator and Online Calculator Center :The first site contains one online scientific calculator if you forgot yours The second link has a collection of over 18,000 online calculators for every purpose.   Geometer's Sketchpad: The resource center has a gallery of Sketchpad work and is a starting point for studying math with this software.   Mathworld: “World’s most extensive math resource.”   Whitney Music Box: Awesome mathematical musical tone generator.		Martin Gardner: An information page on the man who is the reason for my being a math teacher. Also, Gathering for Gardner (g4g) is a website in tribute to Martin Gardner and a annual gathering in his honor.   Coolmath.com: Sort of like an amusement park for math.   Fractal Explorer: One place to start understanding fractal patterns.   Polyhedra Showroom: Scroll down and look at the “Visual Index”, for instance. This gives you the names and forms for all the uniform polyhedra.   Math.com   Mega-Math: Another interesting math website.   Escher Foundation: Homepage for the official M. C. Escher website.   Gamepuzzle: Homepage for a company that sells puzzles. The “Puzzle Parlor” is worth visiting.   Geometry Junkyard: Check out this pile of interesting stuff. Some links are old and broken, but most work fine.   US Census Bureau: An unbelievable storehouse of statistics for browsing or investigations.   Paper Models of Polyhedra