America's Library
America's Library is a site created by the Library of Congress. You can explore many different topics in American history from colonial days to the present.
The White House
This link to the White House includes information about current events, biographies of past presidents and first ladies, and a virtual tour.
The History Channel
The History Channel's website offers information beyond what the cable channel has to offer. Some of the great features this website has to offer are its maps for virtually any location and any time period and "This Day in History" which allows you find out what happened in history on your birthday, or on any other day.