This project proposed team teaching and cross-role training as alternatives to isolated individual teaching and teacher training. Project objectives were a) assessment of student benefit from cross-role teacher training and team formation, b) development of more effective procedures for training professional staff, and c) assessment of student achievement as related to the team concept. A sample team at Weequahic High School, New Jersey included three master teachers, eight teacher interns, eight teacher assistants and two administrators. The master teacher led a cadre of four interns and four assistants in developing team teaching techniques. Interns were student teachers working toward their Ed.M. degrees; assistants were college seniors or parents supported in a college program. The administration consisted of one practicing and one prospective administrator; the prospective administrator acted as team liaison to the community, the school, and the university. In-service team teaching started in September 1972; results are to be analyzed in terms of attitude change, student evaluation, participant evaluation, and climate analysis. (Five tables of data are included.) (JB)