The Physics Education Group in the Physics Department at the University of Washington conducts a coordinated program of research, curriculum development, and instruction to improve student learning in physics (K-20). The work of the group is guided by ongoing discipline-based research. For more than 30 years, we have been deeply involved in the preparation of prospective and practicing teachers to teach physics and physical science by inquiry. In undergraduate physics, we have been engaged in a major effort to improve the effectiveness of instruction at the introductory level and in more advanced courses. These projects provide a context in which we work toward promoting the professional development of teaching assistants and new faculty.