This handbook is a course of study to teach teachers at all grade levels to understand, implement, and teach to their students the causal approach to human behavior. Although the major portion of the handbook is based on the concepts of Ralph H. Ojemman's causal approach to behavior, and the curricular materials are presented to explain this approach, it is contrasted with and supplemented by the approaches of Berman, Raths, Torrance, and others. Provided are thirteen guide units designed to help teachers: 1) recognize the need for promoting mental health in the classroom; 2) understand the causes and effects of behavior; 3) change behavior in the classroom; 4) teach students the causal approach to behavior in different curriculum areas; 5) develop curricular materials for the classroom that will promote mental health; 6) promote individualization and self-directed in learning; 7) understand group dynamics and inter-group relationships. Included in each unit are objectives, purpose statements, group activities, and suggested readings for the exercises, reading assignments and discussions. (Author/RM)