The United States history supplement, one of a series of six high school instructional supplements designed for Indochinese students in American high schools, is written in Khmer and is intended to help students understand the regular textbook. Its content is adapted from a number of standard secondary textbooks, and consists of two parts: basic concepts and a glossary of technical terms. The section on basic concepts consists of brief lessons providing key concepts, in summary form, concerning puritanism, American independence, the new republic, slavery, the Civil War, the black experience, the frontier, the city, the American economy, the response to industrialism, European relations, hemispheric relations, Asian relations, the values conflict of the 1920's, the Depression and the New Deal, totalitarianism and world conflict, World War II, the U.S. policy of leadership and defense in the free world, post-World War II America, contemporary foreign policy, and the challenges of the 1960's and 1970's. The glossary is in English-to-Cambodian dictionary form, with definitions and extensive descriptions of the term when necessary. (MSE)