MELVILE DEWEY
tqjunior.thinkquest.org/5002/?tqskip=1
A nice introduction to the Dewey Decimal Classification system. Created by: The ThinkQuest Team, Don't miss: "Dewey and the Alien" and the fun tests and games in the the "Quizzes and Puzzles" section. The "Ultimate Challenge" provides a nice overview of the geography and history categories.