Ask Dr. Math
http://mathforum.org/math_help_landing.html/
Indexes frequently asked math questions and answers by grade level.
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History of Mathematics
http://www-groups.dcs.st-and.ac.uk/~history/
A subject index on math subjects including mathematicians and history of mathematics, sponsored by the School of Mathematics and Statistics at the University of St. Andrews, Scotland.
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Mathworld Mathematics Resource
http://mathworld.wolfram.com/
Comprehensive mathematics encyclopedia sponsored by Wolfram Research and the National Science Foundation.
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TPL’s Science Online
http://www.wccls.org/periodicals/index.cfm
(Requires WCCLS library card and pin number)
Comprehensive, curriculum-oriented overview of a broad range of scientific disciplines through extensive essays, diagrams, illustrations, images, biographies, experiments, activities, and definitions.
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WebMath
http://www.webmath.com/
Math help from arithmetic through calculus.
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