As teachers enter the school communities of their initial practice, they experience identity shifts that reflect their learning. Throughout teacher education they have constructed an identity informed by their previous school experiences, the ideas and approaches promoted by their teacher education programs, and an ideal of the teachers they hope to become. The complex set of influences at the boundary between their lives as students and their lives as professionals causes them to confront their identities in new and sometimes disruptive ways (Flores & Day, 2006). New teaching situations introduce them to the thinking of experienced teachers, and to the needs of their first groups of learners, challenging the notions they have so far developed about who they are as teachers (Smagorinsky, Cook, Moore, Jackson, & Fry, 2004). This paper reports on interviews with 35 new teachers as they graduate from teacher education programs and enter the profession, and details their learning about agency and role in community resulting in identity changes within this boundary space. (Contains 1 table.)