Math games
http://www.aplusmath.com/Games/index.html
http://www.woodlands-junior.kent.sch.uk/maths/timestable/index.html
Computer Skills
http://www.sabrinasterling.com/index.html
Reading
http://www.storylineonline.net
http://www.seussville.com/#games
http://eduplace.com/kids/index.jsp?state=ca&go.x=28&go.y=15&go=About+submit+buttons
Research
http://www.whitehouse.gov/history/presidents
http://www.thecaliforniamissions.com
http://www.missionscalifornia.com
http://www.americanpresidents.org
Science Fair
http://www.miniscience.com/How-to-do-a-scienceproject.asp?count=7
http://www.sciencebuddies.org/mentoring/project_ideas.shtml
http://earthquake.usgs.gov/learning/kids/sciencefair.php
http://www.all-science-fair-projects.com/
Social Science