"This handbook shares successful models and practices of teacher professional development and learning along with suggestions for sustaining professional development. The handbook is intended to address professional development issues for P-12 educators in all content areas, forges a balance between policy issues and theoretical frameworks, along with presenting recommendations for best practices in professional development. It is divided into four parts: (1) professional development past and present; (2) the complexity of professional development in today's schools; (3) developing solutions for effective professional development; and (4) pulling it all together"--