Designed for high school seniors, this unit, consisting of a teaching guide and instructional materials for students, focuses on the nature and meaning of the obligation of an American to his country and himself in regard to military service. Cognitive objectives are to provide students with an understanding of conscription, of the Selective Service System of the U.S., of alternative responses to military services and alternative means of providing for the national defense. Affective objectives are to help students explore the nature of their obligation to themselves and their country, of alternative positions, and of patriotism and loyalty. Activity units introduce role playing, skits, filmstrips, readings, and class discussion. The teacher's guide outlines intended content and activities for each of the twenty day class periods. Most student instruction materials are included in the workbook. Topic headings for the four parts are: The Selective Service System and Conscription in the U.S., Alternative Means of National Defense, Alternative Individual Responses to Military Obligation, and Individuals in Interaction within the Selective Service System. Appendices include other activities, tests and answers, charts, role assignment sheets and cards. (SJM)