Document Number: 4236What We Know About Successful School Leadership - These research-based conclusions about successful school leadership can be used to guide leadership practice, policy and research. (1) Leadership has significant effects on student learning, second only to the effects of quality curriculum and teaching. (2) Administrators and teachers provide most school leadership, but other potential sources of leadership exist. (3) A core set of practices form the "basics" of successful leadership and are valuable in almost all educational contexts. (4) Successful school leaders respond productively to challenges and opportunities created by today's accountability-oriented policy context. (5) Successful leaders respond productively to the opportunities and challenges of educating diverse groups of students. (Kenneth A. Leithwood and Carolyn Riehl, American Educational Research Association, January 2003)...