Websites
American Mathematics Society
http://www.ams.org/
The official society for mathematics scholars.
AMS Websites
http://www.ams.org/ams/math-websites.html
A small gateway to math websites, maintained by the American Mathematics Society.
Geometry Step-By-Step from the Land of the Incas
http://agutie.homestead.com/
Created by Antonio Gutierrez, a geometry and computer teacher who lives
in Lima, Peru, this website, according to its creator, promises to "an eclectic mix
of sound, science, and Incan history intended to interest students in Euclidean
geometry". The site includes geometry problems, proofs, quizzes, puzzles, quotations,
scientific speculation, and more." (http://agutie.homestead.com/files/index.html) Accompanied by music, it's a great place to explore geometrical concepts.
The Internet Guide to Engineering, Mathematics, and Computing
http://www.eevl.ac.uk/mathematics/index.htm
This award-winning free gateway is maintained by a number of universities and institutions in the UK. "EEVL's target audience is students, staff and researchers in higher and further education, as well as anyone else working, studying or looking for information in Engineering, Mathematics and Computing." (http://www.eevl.ac.uk/about.htm)
The Math Forum at Drexel
http://mathforum.org/
The Math Forum at Drexel, a "the leading online resource for improving math learning, teaching, and communication" (http://mathforum.org/), run by math educators and students. Includes online tools for understanding math concepts and resources for math teachers, as well as Ask Dr. Math, for all your math questions.
Scirus - Elsevier
http://www.scirus.com
Drawing information only from web sites with scientific information (e.g. university web sites, author homepages, the ScienceDirect database of scientific information resources collected from an array of reputable sources), this search engine, powered by FAST and owned by Elsevier, claims to be "the most comprehensive science-specific search engine on the Internet […] searching over 150 million science-specific Web pages." (http://www.scirus.com/srsapp/aboutus/)
The advisory board consists of library, scientific, and technical boards with members from predominantly U.S. and European universities and colleges.
Shodor Education Foundation
http://www.shodor.org/
This "national resource for computational science education" aims to "advance...science and math education through the use of modeling and simulation technologies". (http://www.shodor.org/about/) The website offers curriculum material, faculty development, and student enrichment activities, including this list of interactive activites.