This report is on an innovative model of student teaching in elementary education that emphasizes collaboration among different levels of part-time student teachers, full-time student teachers, mentor teachers, principals and university supervisors. The CORE (Collaborations for Renewal of Education) model of student teaching has a strong focus on peer coaching and peer observation. Student teachers learn not only through interactions with mentor teachers, university faculty, administration, parents and the community, but also from interactions with each other and through introspection and reflection. After description and discussion of the CORE model, preliminary research of the model is discussed. In one semester of student teaching in a school with a highly diverse student population, data was collected on participants as they collaborated with peers, mentor teachers, and university faculty in the CORE model. Through participant observation, interviews, and examination of artifacts, common themes and concerns were identified that focused on collaboration, English learners, and classroom management.