In this article, the authors examine two distinct but closely related fields, research on teaching and research on teacher education. Despite its roots in research on teaching, research in teacher education has developed in isolation both from mainstream research on teaching and from research on higher education and professional education. A stronger connection to research on teaching could inform the content of teacher education, while a stronger relationship to research on organizations and policy implementation could focus attention on the organizational contexts in which the work takes shape. The authors argue that for research in teacher education to move forward, it must reconnect with these fields to address the complexity of both teaching as a practice and the preparation of teachers. (Contains 8 notes.)