Book excerpt: While most educators believe working in teams is valuable, not all team efforts lead to instructional improvement. Through richly detailed case studies The Power of Teacher Teams demonstrates how schools can transform their teams into more effective learning communities that foster teacher leadership. The benefits of successful teacher teams include: improved performance for both teachers and students; meaningful professional development; group adoption of a new curriculum; shared insights into student work; better classroom management; support for new teachers; new roles for teacher leaders; and opportuniteis for mentor support.School leaders will find guidelines, methods, and concrete steps for building and sustaining effective teacher teams. Also included is a DVD with video case studies and one CD with reproducibles. The most important reason for building teacher teams is to enhance student learning through improved instruction, and that story is at the heart of this book.