calculate anything anywhere..

http://www.calculator.com/

Math Magic

MathMagic was a K-12 telecommunications project developed in El Paso, Texas by Alan A. Hodson. The intent of the project was to provide motivation for students to use computer technology while increasing problem-solving strategies and communications skills. MathMagic posted challenges in each of four categories (k-3, 4-6, 7-9 and 10-12) which are now archived and available to view in plain text or download in MS Word file format.

http://mathforum.org/mathmagic/

AplusMath

This web site was developed to help students improve their math skills interactively.
Visit game room and play exciting games like Matho and Hidden Picture...Test your math skills with our Flashcards! Try out the Math Word Find puzzle.
Create and print your own set of flashcards online using the Flashcard Creator! See the Worksheets section, where you can print worksheets to practice offline. Try the Homework Helper to check your homework solutions.

Math Archives

http://archives.math.utk.edu/

Math Teacher Link

Math Teacher Link is a web-based professional development program for mathematics teachers at the 9 - 14 grade levels. It provides short courses on the use of technology in teaching mathematics.

http://mtl.math.uiuc.edu/

The Geometry Center

The Geometry Center is a mathematics research and education center at the University of Minnesota. The Center has a unified mathematics computing environment supporting math and computer science research, mathematical visualization, software development, application development, video animation production, and K-16 math education.

http://www.geom.uiuc.edu/

The Beauty of Mathematics

"To those who do not know mathematics it is difficult to get across a real feeling as to the beauty, the deepest beauty, of nature ... If you want to learn about nature, to appreciate nature, it is necessary to understand the language that she speaks in"
Richard Feynman