MathGames

multiplication
http://www.aplusmath.com/games/matho/MultMatho.html

tables
http://www.aplusmath.com/Flashcards/multiplication.html

rearranging tiles
http://nlvm.usu.edu/en/nav/frames_asid_327_g_4_t_2.html

puzzle of hanoi
http://nlvm.usu.edu/en/nav/frames_asid_118_g_4_t_2.html

Yahtzee
http://staff.argyll.epsb.ca/jreed/javaMath/yahtzee/

IQ Tests
http://www.allthetests.com/tests/iq-test.php3
http://www.pressanykey.com/cgi-bin/jquiz.cgi?process

fractions
http://www.learnalberta.ca/content/mejhm/index.html?l=0&ID1=AB.MATH.JR.NUMB&ID2=AB.MATH.JR.NUMB.FRA&lesson=html/object_interactives/fractions/use_it.html

Useful Link
http://archives.math.utk.edu/visual.calculus/0/index.html


chemistry site
http://www.umanitoba.ca/outreach/crystal/chemistry.html