US National Archives
Our Documents: 100 Milestone Documents
A collection of one hundred documents that are significant in shaping the history of the United States, beginning with the Lee Resolution of June 7, 1776, and ending with the Voting Rights Act of 1965.
Smithsonian Institution
Smithsonian Source: Resources for Teaching American History: Primary Sources
A varied collection of primary resources from American history. They include portraits, banknotes, artifacts, newspaper items, paintings, and illustrations.