National Geographic for Kids http://www.nationalgeographic.com/kids/
Area Formula Lab http://mason.gmuedu/~mmankus/AreaLab/0Area.htm
Homework help and games http://www.aplusmath.com
Math Games http://www.coolmath4kids.com
Sudoko http://www.counton.org
Coordinate Geometry http://www.nyiteez.org/MarcoPoloNY/ProgramDetail.php?CourseID=IL041520
Developing Area Formulas http://www.nyiteez.org/MarcoPolo/ProgramDetail.php?CourseID=IL051987
Math Games-Bingo/Concentration etc. http://www.aplusmath.com/games/
New Games http://www.gamequarium.com/math.htm
MATH PLAYGROUND AND GAMES http://www.mathplayground.com/
Great games for middle school! http://www.coolmath.com/