This compilation brings together three previously published papers on the role of professional development in school restructuring. The three papers articulate a new paradigm for professional development in teaching which sees opportunities for teacher development residing in collegial work settings, team teaching environments, school improvement networks, and school-university collaboratives. "Teacher Development in Professional Practice Schools" by Ann Lieberman and Lynne Miller provides a framework for developing a culture of inquiry in a school, considers professional growth activities that are appropriate to that culture, and discusses problems and dilemmas that must be recognized and worked through to maintain and support teacher development in professional practice schools. "Accountability for Professional Practice" by Linda Darling-Hammond explores the contributions of professionalism to school accountability in the context of the professional development school. "Networks for Educational Change: Powerful and Problematic" by Ann Lieberman and Milbrey McLaughlin examines the power of networks, the problems of networks, and implications for policy. (References accompany each paper.) (JDD)