Here are some links to help students increase their knowledge of math facts:

http://www.oswego.org/ocsd-web/games/Mathmagician/mathsmulti.html

http://www.honorpoint.com/

http://hoodamath.com/games/multiplicationgame.php

http://www.oswego.org/ocsd-web/games/SumSense/summulti.html

http://www.multiplication.com/flashgames/Moles.htm

http://www.multiplication.com/flashgames/wadesworkout.htm