On-line Tutorials

Math

http://www.math.com

http://www.ifigure.com/math/help/help.htm

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

Chemistry and Physics

http://www.launc.tased.edu.au/online/sciences/physics/tutes1.html

http://www.physicsclassroom.com/

Writing

http://owl.english.purdue.edu/

http://grammar.quickanddirtytips.com/default.aspx

Assorted Subjects

http://www.khanacademy.org/

http://www.sparknotes.com/

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