Designed for middle and junior high school students, the Human Sciences Program (HSP) represents a three year, interdisciplinary program which focuses on the role of the natural sciences in promoting the cognitive, psycho-social, and moral development of early adolescents. The materials consist of modules of activities designed around major themes with sub-problem areas or clusters. Individual students or small groups select activities of their choice. The evaluation plans, procedures, and results of the project's formative evaluation are presented in this document including the field testing of HSP levels I, II, and III; evaluation of the Level III module, "Knowing"; adult evaluation; and other studies such as readability, attitude, and logical competence. The evaluation indicates, among other findings, that (1) the project was equally effective in different areas of the country and with a variety of teachers and students; (2) that an interdisciplinary program could work in self-contained classrooms, departmentalized schools, and team-teaching contexts; and (3) that student selection of activities was not based upon content, difficulty, or sex of student. (DC)