MATHMATICS
Centre for Innovation in Mathematics Teaching - Offered by the University of Exeter, this site offers a variety of resources to enhance mathematics teaching in schools.
http://www.ex.ac.uk/cimt/
Digital Librarian - Mathematics
http://www.digital-librarian.com/math.html
Eric Weisstein's World of Mathematics - touted as the Web's 'most complete mathematical resource', MathWorld is a comprehensive mathematics encyclopedia designed for students, educators, math enthusiasts, and researchers.
http://mathworld.wolfram.com/
Mathematical Functions - from the website: "Providing the mathematical and scientific community with the single most comprehensive and unified resource of information about mathematical functions."
http://functions.wolfram.com/
Mathematics Help Central - offering lecture notes, examples, and links to other math sites.
http://www.mathematicshelpcentral.com/
Mathematical Sciences Digital Library - managed by the Mathematical Association, this site offers online resources for both teachers and students of collegiate mathematics. http://www.mathdl.org/
PRIME Mathematics Encyclopedia - online encyclopedia designed primarily for math educators, with over 1,000 entries.
http://www.mathacademy.com/pr/prime/index.asp
