Multiplication Games-tons of games! http://www.multiplication.com/interactive_games.htm
Multiplication Games--choose which facts to practice! http://www.multiplication.com/interactive/quickflash/flash/index.html
Multiplication http://www.aplusmath.com/games/matho/MultMatho.html
Math Problem of the Day http://www.mathsurf.com/teacher/
Math Playground...tons of games and fun! http://www.mathplayground.com/
Games for all mathematical areas... http://www2.redmond.k12.or.us/mccall/renz/mathsites.htm#4
Measurement http://harcourtschool.com/activity/which_tool/