Super Fun Social Studies Stuff!
http://www.mrnussbaum.com/timedir.htm
http://www.mrnussbaum.com/nativeamericans/indintscav.htm
Aztec Quiz
http://www.softschools.com/quizzes/social_studies/aztecs/quiz241.html
Climate Quiz
http://www.softschools.com/quizzes/social_studies/climate/quiz784.html