These units of study provide the basis for a semester long independent course of study in United States history for high school students. The major theme of the 16 units is technological and social change and how people throughout history have reacted to it. Students read, take a mastery test, and review results with the instructor. Extra credit is possible through projects. The sixteen units treat the growth of industry, the farmer and worker, progressivism, foreign policy, the twenties, the depression, the New Deal, World War II, the frontier, agriculture, conservation, big business, business cycles, foreign trade development of unions and labor legislation. An overview, student assignments in the form of textbook readings, and study questions are provided for each unit. A bibliography of textbooks which students must use for the course is provided. No specific project ideas are presented. Mastery tests, which comprise approximately 75 percent of this document, are provided for each unit. (Author/RM)