Synthesizing the best current knowledge on teacher professional development (PD), this handbook describes effective, innovative practices that are being used in schools today. Leading authorities present PD approaches that are instructive, reflective, active, collaborative, and substantive. The book explores the relationship of PD to adult learning theory, school leadership, district and state policy, the growth of professional learning communities, and the Common Core State Standards. Practical issues in implementing PD are addressed, as are strategies for measuring and sustaining successful programs. Each chapter concludes with thought-provoking discussion questions. The appendix provides eight illuminating case studies of PD initiatives in diverse schools.