Math Magician - addition, subtraction, multiplication and division timed tests

http://www.oswego.org/ocsd-web/games/Mathmagician/cathymath.html

Math Baseball - addition, subtraction, multiplication or division. Choose your level.

http://www.funbrain.com/math/index.html

Four Different Math Games: Math-O (+, x, /); Hidden Pictures (+, -, x, /); Concentration (+, x); Planet Blaster (all operations or algebra)

http://www.aplusmath.com/Games/games.html

Concentration - addition & subtraction facts

http://www.quia.com/cc/387225.html

TimezAttack - There is a "FREE" version which is easy to get to... just scroll down and sign in.

http://www.bigbrainz.com/index.php?PARTNER=brettstaylor

Math Mayhem - Addition, Subtraction, Multiplication or Division

http://www.learningplanet.com/act/mayhem/index.asp

Multiplication - just like flash cards. You choose the level.

http://www.multiplication.com/interactive/quickflash/flash/index.html

A Variety of Multiplication Games to choose from... try them all!

http://www.multiplication.com/interactive_games.htm

A variety of games. Being able to read directions is necessary! No sign up required to play.

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

Time Games - matching the analog to the digital

http://www.oswego.org/ocsd-web/games/StopTheClock/sthec1.html

Metric Measurement - linear and weight

http://www.bbc.co.uk/schools/ks2bitesize/maths/activities/measures.shtml

Time - telling time and finding elapsed time

http://www.bbc.co.uk/schools/ks1bitesize/numeracy/time/index.shtml