Here are two great sites to use in the classroom:
Coffee Break Arcade is a wonderful site full of puzzle games, word games, math games, and loads more! There are a variety of games to choose from.
http://coffeebreakarcade.com/classic.htm
Wordle is a fun site that creates word clouds. Simply enter your report or notes and wordle turns it into a fun visual.
http://www.wordle.net/