This study was conducted to develop, implement, and evaluate a 9-week unit interrelating the health aspects of home economics and physical education at the sixth grade level. The curriculum, which emphasizes physical, social, and mental health, was designed by: (1) diagnosing needs of the students, (2) formulating specific objectives, (3) developing evaluation strategies, (4) analyzing and developing learning experiences, (5) implementing and testing output, and (6) making improvements. Following review by six curriculum specialists, the unit was implemented with 82 sixth graders by four teachers on the development team. Analysis of pre- and post-test results indicated there was a significant difference in the scores, and it was assumed that part of the difference was due to the curriculum. Teachers' logs indicated that: (1) Interrelating two disciplines in a curriculum gives support and reinforcement to the objective for the teachers as well as the student, and (2) Active involvement of teachers in the development process creates interest in making each part of the curriculum meaningful and in accomplishing objectives. Sample evaluation instruments, teachers' and students' materials, and other study materials are appended. (Author/SB)