Future teachers of education are Current students that  focus on the development of teacher knowledge in the field of theory and practice in practicum as an important part of the teacher training program. One of the effective factors in the pre-service programs is schools coach, The study seeks it. The reserch method used in this study was qualitative method and was of phenomenological type. And focuses on four participants, among 22 cases. Participants are 91-92 students have completed 3 practicum. The data is collected through semi-structured interviews and participant observation. As well as semi-structured interviews were done with their mentors. Data through Strauss and Corbin analysis were categorized. The data shows that coach can develop their competence as the greatest intervention in the professional world, Sometimes that role as coach is show As an imitation, or as a joint  exprementation and sometimes in the form of hall of mirrors.