This manual contains classroom exercises which can be used to supplement each chapter of the story "Mark," (ED 189 016) designed to help adolescents formulate a philosophy of values. The purpose of both "Mark" and "Social Inquiry" is to identify key social issues in the social sciences and expose students to the conflicting concepts at the heart of each issue. The story and exercises are well-suited for use in high school social studies courses and/or in philosophy or guidance units. The broad themes which are recurrent throughout "Social Inquiry" focus on the concepts of government, law social institutions, community, society, human nature, and justice. Teaching techniques emphasize discussion among students to encourage and develop thinking skills and reasoning exercises to develop reasoning skills. Students are encouraged to apply their critical understanding to specific situations. The manual begins with an introduction to the teacher on how to use the manual, followed by exercise charts which identify each exercise in the manual and show into which category each exercise primarily falls, i.e., philosophical discussion, problem situation for analysis, etc. The booklet is arranged into eight chapters, each chapter contains numerous exercises. For example, chapter 1 contains 15 exercises which begin with leading ideas for the teacher on such topics as mediating a fight, asking for reasons, and similarities and differences. (Author/RM)