Here are some of the fun websites we play games from at school! You can use them at home to sharpen your math skills and have some fun at the same time:
http://www.cobbk12.org/sites/literacy/math/math2.htm
http://www.eyepleezers.com/aaamath/grade3.htm
http://www.ixl.com/math/grade-3
http://www.sheppardsoftware.com/mathgames/placevalue/fruit_shoot_place_value.htm
http://mathfactcafe.com/view/view.aspx?t=F&g=3
These webistes are all excellent tools to use to practice your facts too!