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• English-Spanish Math Dictionary
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• NIST 14 MS library

(::: M@TH en Ligne - trouver de l'aide, partager vos connaissances et votre expérience, débattre de questions relatives à l'enseignement des mathématiques, discuter de points de théorie. (related French-speaking math message board at Université de Liège)

• Wikipedia -- open encyclopedia - contains many math-related articles
• PlanetMath.org -- open math encyclopedia
• Eric Weisstein's Mathworld -- an extensive collection of mathematical theorems and formulas.
• S.O.S. Math - math tables, explainations, examples, and bulletin board.
• Ask Dr. Math -- the question answerer.
• Math.com- general math resources
• The Math Forum -- many good math resources organized by subject, plus an extensive archive on commonly-asked questions.
• The Math Archives -- lesson plans, software, resouces, and web-sites for K-12 math education.
• AmericaTakingAction.com. - other math resources
• Manipula Math with Java -- over one hundred graphical JAVA applets that demonstrate mathematical concepts (elementary to calculus).
• QuickMath - solves college and highschool problems automatically
• Calc101.com - does derivatives and integrals, with each step explained
• Math Addicts Anonymous - weblog-like math site
• A Resource Guide to Algebra - links to resources on algebra