"Smarthistory is a collaboration of more than 200 art historians, archaeologists, curators and other specialists who want to make the highest-quality art history learning content freely available to a global audience. "
A primary source reader on American History intended for undergraduate students. Don't let the title fool you - the list of scholarly contributors from US universities is astounding. Editorial intent: "The American Yawp constructs a coherent and accessible narrative from all the best of recent historical scholarship. Without losing sight of politics and power, it incorporates transnational perspectives, integrates diverse voices, recovers narratives of resistance, and explores the complex process of cultural creation."
This is a K-12 site, but very extensive: "The materials on this Web site include a U.S. history textbook; over 400 annotated documents from the Gilder Lehrman Collection, supplemented by primary sources on slavery, Mexican American, Asian American, and Native American history, and U.S. political, social, and legal history; succinct essays on the history of film, ethnicity, private life, and technology; multimedia exhibitions; and reference resources that include a database of annotated links, classroom handouts, chronologies, glossaries, an audio archive including speeches and book talks by historians, and a visual archive with hundreds of historical maps and images." Affiliations: University of Houston and the Gilda Lehrman Institute of American History