This study examines the effects of four team-based structures on the organizational commitment of elementary teachers in an urban school district. The study model focuses on organizational commitment and includes three intervening, endogenous variables: teacher empowerment, school communication, and work autonomy. Team teaching had both direct and indirect effects on commitment to the school. Curriculum teamwork, governance teamwork, and community-relations teamwork each contributed indirectly to higher levels of teacher commitment. Research results suggest the need for organizational designs and procedures that reinforce teacher identification with and involvement in the school organization. (Contains 7 tables and 1 figure.)