Ben's Guide: http://bensguide.gpo.gov (How the government works with Ben Franklin as your guide)
The Whitehouse Website: http://www.whitehouse.gov/about/presidents
The Food Timeline: http://www.foodtimeline.org/presidents.html
American Time Periods: http://www.americaslibrary.gov/jb/index.php (for seeing what life was like at the time their president was alive)
President Basic Facts: http://mrnussbaum.com/presidents/presidents