Mr. Putorti's Math Page
A Plus Math
The Math Forum: Critical Thinking Puzzles
The Canadian School Math Page
Math Goodies
Librarian's Index to the Internet Math Links
Euclid's Elements - illustrated with movable figures using Java applets.
Math Online
Help with math homework.
Math.com
Many math resources including homework help.
Hotmath.com
Explainations for odd numbered problems in many different textbooks.
Interactive Mathematics
Link to the National Library of Virtual Manipulatives.