Check these online games out!

MATH GAMES
GameQuarium, http://www.gamequarium.com/math.htm
Play Kids Games, http://www.playkidsgames.com/mathGames.htm
FunBrain, http://www.funbrain.com/kidcenter.html
CoolMath, http://www.coolmath.com/
Sheppard Software, http://www.sheppardsoftware.com/math.htm
The School Bell, http://www.theschoolbell.com/Links/math/number_families/main/games_online.html

SCIENCE GAMES
NASA, http://kids.earth.nasa.gov/games/

HISTORY GAMES
GameQuarium, http://www.gamequarium.com/americanhistory.html

SPORTS GAMES
CandyStand, http://www.candystand.com/games.do?category=sports
Yahoo! Kids, http://kids.yahoo.com/games/games-index/5--Sports

ART & HISTORY GAMES
Yahoo! Kids, http://kids.yahoo.com/games/games-index/6--MovieTV

PUZZLE & MAZE GAMES
Play Kids Games, http://www.playkidsgames.com/problem_solveGames.htm

MIND GAMES
Play Kids Games, http://www.playkidsgames.com/memoryGames.htm
Play Kids Games, http://www.playkidsgames.com/alphabetGames.htm
FunBrain, http://www.funbrain.com/brain/ReadingBrain/ReadingBrain.html

BOARD & CARD GAMES
Yahoo! Kids, http://kids.yahoo.com/games/games-index/2--BoardTile

ARCADE GAMES
FunBrain, http://www.funbrain.com/brain/JustForFunBrain/JustForFunBrain.html
Yahoo! Kids, http://kids.yahoo.com/games/games-index/15--Arcade

ALL OTHER GAMES
Shockwave, http://www.shockwave.com/kids.jsp
Scholastic Books, http://www.scholastic.com/kids/stacks/games/
The Kidz Page, http://www.thekidzpage.com