Drawing on twenty years of research in school effectiveness, this book presents a distributed model of task-based school leadership that leads to continuous school improvement. The book outlines the tasks school leadership teams must focus on to improve teaching and learning, grouped into the following five domains: * Focus on Learning * Monitoring Teaching and Learning * Building Nested Learning Communities * Acquiring and Allocating Resources * Maintaining a Safe and Effective Learning Environment Recognizing that the principal is a single actor in a complex web of activity influencing student learning, the focus is not only on the principal's role but on a range of leadership and instructional practices to be shared across the leadership team (including APs, counselors, teachers, and support personnel). These tasks, organized into 21 subdomains, have been demonstrated through extensive research to contribute to improved student learning.