This health education guide for teaching second graders in the Duval County Public Schools (Jacksonville, Florida) follows the comprehensive program for K-12 that aims to help students gain an intelligent understanding of health as a unity of physical, mental, and social well-being. Two primary ideas are dealt with in this guide: (1) the body has a basic structure and function; and (2) development in individuals may be altered by factors in the environment. Detailed lesson plans include concepts/skills to be mastered, test references, estimated teaching times, objectives, instructional materials, teaching procedures, evaluation procedures, and enrichment and reinforcement activities. (CMG)