This book discusses the challenges to developing a teaching force that is competent to work with immigrant students, arguing that professional development should be re-thought and teacher educators should move far beyond traditional inservice and teacher training. A framework is developed for considering what teachers of immigrant youth need to understand about their students, what kinds of professional development experiences are likely to facilitate those understandings, and what kinds of teacher education programs and school settings are able to support their ongoing learning. It is argued that professional development should occur during preservice education, during induction, when teachers are adjusting to being part of the school staff, and throughout teachers' careers. Promising new structures and practices for professional development are described, focusing on those that promote community, collegiality, and collaboration. Innovative approaches to preservice and inservice professional development in California, Maryland, Minnesota, and New York are profiled. (Contains 55 references.) (MSE)