POTUS
Websites
From the White House
The Presidents
http://www.whitehouse.gov/about/presidents
From the Miller Center
American President: A Reference Resource
http://millercenter.org/president
Databases:
Grolier Online > America the Beautiful > US Topics > Presidents
World Book Online: Search individual Presidents
Facts on File > American History Online > Browse Biographies > Highlighted People > US Presidents
Click here for the Database Page