Two related case studies of secondary mathematics teachers examine the roles and conditions helpful in initiating, directing, and/or supporting teachers' own professional development. Using multiple data sources from school-based and professional settings, we applied analytic induction to identify patterns of similarities and differences in…

Through the process of initiating, implementing, and sustaining a schoolwide professional learning community (PLC), teachers and administrators at the pseudonymous Silver Valley Middle School provide a powerful example of distributed leadership in action. New leadership roles, coordination, and interdependency among staff have led to an increased…

Background/Context: The type of professional development provided for teachers has been undergoing change from a one-time workshop approach to a more embedded, long-term, reflective, and collaborative structure. Although findings on the impact of new forms of professional development (PD) are beginning to emerge in the literature, there is little…