Here is the ideal handbook for current and aspiring elementary and secondary educators and leaders, teacher-leaders, and school leaders. In it, the authors have provided a wealth of ready-to-use information and suggestions on the roles of principals as leaders of leaders; the roles of teacher-leaders as they lead; the culture in which teacher-leaders emerge, develop, and are supported; and the function of building principals as catalysts for and champions of this supportive, constructive environment. Who are teacher-leaders, how does one become a teacher-leader, and what works to overcome the barriers along the way? How do educators share leadership and build collective efficacy? How does one make that teacher-leader paradigm shift? What do teacher-leaders need to learn about standards, development programs, and sustainability, and how do they go about learning it? These questions and many more are answered in this practical book that shows clearly how to break down the old "us" versus "the" mentality and build and sustain a school culture of distributive leadership, trust, and collective mindfulness.