National History Day Official Website

American Memory Project
Multimedia collections of digitized documents, photographs, recorded sound, moving pictures, and text from the Library' of Congress' Americana collections.

Archival Research Catalog
Find holdings nationwide from the National Archives and Records Administration (NARA).

Digital History
American history primary sources.

FindLaw
Supreme Court opinions from 1893 to present.

Historical Census Browser
Census data from U.S. states and counties dating from 1790 to 1960.

Our Documents
100 milestone documents of American history.

Thomas: Legislative Information
Search for science, technology and invention information from the 103rd Congress forward.