National Geographic for Kids http://www.nationalgeographic.com/kids/
United States History and Trivia http://www.americaslibrary.gov
A virtual earth that even lets you zoom into your own house! Take a virtual trip to Stonehenge or the Great Pyramids! http://www.googleearth.com
List of Government Websites for Kids http://bensguide.gpo.gov/subject.html
White House for Kids http://www.whitehouse.gov/kids/whlife/index.html
Social Studies Unit 2 Review http://harcourtschool.com/ss1/Grade2/interactives/gr2_unit2.html