The roles of the principal and the lead teacher in a team are closely related in that the lead teacher serves the unit team in much the same way as the principal serves the entire building staff. The prime function of the lead teacher is instructional improvement, and his basic concerns center around the teaching team and children who comprise the unit. The lead teacher has responsibilities both as a member and leader of the team, and as a member of the entire instructional staff. The uniqueness of his position is such that he can and should be involved in the processes of instructional improvement and employment of new team members. While the principal consults and is aware of the decisions and practices of the teams in his building, he asserts more positive leadership in connection with developing improved educational practices, managing the pre- and inservice teacher education activities of the school, and administering research and development projects. In a school involved in team teaching, a network grows with lead teachers consistently serving as linkage agents between the team and the principal. The effectiveness of a team-organized school depends on the ability of the principal and lead teachers to work together. In a multiunit school, provision for shared, school-wide decision making is made through the instructional improvement committee, consisting of the principal and the team leaders. (HMD)