Fun Brain http://www.funbrain.com/kidscenter.html
Primary Games http://www.primarygames.com/
Discovery Kids http://kids.discovery.com/games/games.html
Scholastic Deep Sea Math Hunt http://teacher.scholastic.com/mathhunt/StartGame.asp?QuizID=1
Scholastic News Hangman http://teacher.scholastic.com/scholasticnews/games_quizzes/hangman/index.asp