Described and evaluated is a Marion County, Florida, program which applied the team teaching method to instruction of 45 educable mentally retarded 10- to 14-year-old students. It is stressed that the philosophy of the middle schools and of team teaching is to provide a means of meeting individual needs of students. Described are the program's physical facilities (one large and two small classrooms), qualifications of five team members, the student population (97% black), and curriculum development. Explained are goals and objectives in the area of self concept, social relations, and academics. Reported are results of program evaluation showing that growth in the areas of reading and arithmetic matched the time lapse between test administrations, and that important positive behavioral changes were observed in student attitudes, independence and pride in work, peer relationships, and self control. A final section focuses on the instructional process of the teaming program in terms of variables (such as the need for peer group acceptance), staff, and program scheduling and policies. Also discussed is the process of developing individual educators to become cooperating team members. Recommendations are given in the areas of personnel selection, classroom management, curriculum, and physical space. Appended are a questionnaire, a teacher evaluation form, and a lesson plan form. (DB)