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Math
http://exchange.smarttech.com/search.html?subject=Mathematics
http://mrnussbaum.com/mathcode/http://www.free-training-tutorial.com/math-games.html
http://www.mathplayground.com/
http://members.learningplanet.com/teachers/index.asp#math
http://www.arcademicskillbuilders.com/
http://www.decimalsquares.com/dsGames/
http://www.bbc.co.uk/education/mathsfile/shockwave/games/laddergame.html