Building on extensive evidence that school-based teacher learning communities improve student outcomes, this book lays out an agenda to develop and sustain collaborative professional cultures. McLaughlin and Talbert—foremost scholars of school change and teaching contexts—provide an inside look at the processes, resources, and system strategies that are necessary to build vibrant school-based teacher learning communities.Offering a compelling, straightforward blueprint for action, this book:* Takes a comprehensive look at the problem of improving the quality of teaching across the United States, based on evidence and examples from the authors’ nearly two decades of research.* Demonstrates how and why school-based teacher learning communities are bottom-line requirements for improved instruction.* Outlines the resources and supports needed to build and sustain a long-term school-based teacher professional community.* Discusses the nature of high-quality professional development to support learning and changes in teaching.* Details the roles and responsibilities of policymakers at all levels of the school system.