Social Studies links:
http://www.sheppardsoftware.com/World_Continents.htm Learn the continents in a game format
http://www.primarygames.com/social_studies.htm
http://games.pppst.com/socialstudies.html
http://teacher.scholastic.com/activities/immigration/tour/ Information about Ellis Island and immigration
http://www.learninggamesforkids.com/social_studies_gamesgames for Presidents, Famous Ladies, Ben Franklin, etc.
http://www.earthcam.com/usa/newyork/statueofliberty/ Live webcam from the Statue of Liberty near Ellis Island
http://mrnussbaum.com/totem/ - totem pole maker

http://www.sheppardsoftware.com/usa_game/government/index.htm branches of government