This book provides leaders and teams with a blueprint of how to work through a problem to find possible solutions while valuing each member of the team. Research shows that "teacher collective efficacy" - when all teachers are collectively engaged and focused on improvement - can do more to increase student learning than any other strategy. In fact, using powerhouse teams can achieve four years of student growth in a single calendar year. The book includes step-by-step tools that will help the school team move from identifying its biggest challenges to choosing and implementing successful reforms strategies to enhance teamwork, trust, and collaboration.