Descriptions of lessons within each of three computer-based curricula for high school students (U.S. government, U.S. history, and introductory economics) are presented in this instructor's manual. Each curriculum is divided into lesson units and covers basic concepts. The reading-level is approximately tenth grade. Each unit consists of a pretest and computer instruction. If students do not pass a pretest, they are assigned the appropriate lesson. Posttests are not given because the lessons are mastery-based and give students intensive review drills. The U.S. government curriculum is composed of six units and six lessons. The U.S. history curriculum is composed of 15 units and 15 lessons. The introductory economics curriculum is composed of five units and five lessons. This manual is intended only as a supplementary guide to the computer programs containing the lessons to be used in the classroom. (DB)