Digital History (University of Houston)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; multmedia 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.