mathgames

Access Math Games here:

Algebra Math Games http://www.math-play.com/Algebra-Math-Games.html

Walk the Plank (a pirate game about integers) http://www.math-play.com/integers-game.html

Some silly games (such as one involving stacking cows): http://e-learningforkids.org/courses.html#math

Lovely,Lovely Logic Games and Puzzles: http://www.mathplayground.com/logicgames.html

Coordinate planes: http://www.math-play.com/coordinate-plane-game.html

Math Games and Puzzles (you can choose the level of challenge) http://www.coolmath4kids.com/

General Review http://www.ixl.com/math/grade/sixth/

Sudoku @http://www.sodoku-sodoku.com/

Funbrain http://www.funbrain.com/brain/MathBrain/MathBrain.html

Not really a game, but this has some pretty good review and practice http://www.aaaknow.com/grade8.htm