(from The American Social History Project/Center for Media and Learning of the
City University of New York and the Center for History and New Media at George
Mason University, for high school and college teachers of U.S. History survey
courses)
(especially the "The Leaning Place" with biographies, exhibits, museums,
and links on women's history)
U.S. Historical Documents Archive
(substantial listings of US documents arranged by era and by type, though
without citation information, updated?)
United States Newspaper
Project
(National Endowment for the Humanities in cooperation with the Library of
Congress, provides access to United States newspapers from the 18th century
onwards)