Preface - Wayne K. Hoy and Cecil G. Miskel; Examining School Achievement Over Time: A Multilevel, Multiple-Group Approach, Ronald H. Heck; Instructional Leadership: Its Nature, Meaning, and Influence - Jana M. Alig-Mielcarek and Wayne K. Hoy; Assessing Leadership Effects on Student Learning: Selected Challenges for Research and Program Evaluation - Kenneth Leithwood and Ben Levin; School Leadership in the 21st Century: Broadening the Base - Carolyn M. Shields; Leadership as a Master Class: Joining Role and Task in the Practice of Educational Administration - Jacqueline Cossentino; Distributed Leadership: Leadership Practice and the Situation - James P. Spillane, Jennifer Z. Sherer, and Amy F. Coldren; Talking Leadership: Conversation Analysis and Distributed Leadership - R. Keith Sawyer, Jay Paredes Scribner, Sheldon T. Watson, and Vicki L. Myers; Systemic Reform Up Close (and in the Trenches): A Multiyear Case Study of an Outlier School - Juanita Garcia and Robert Donmoyer; Making Privatization Palatable: The Politics of Sylvan Support Centers in the Baltimore Public School System - Betty Malen, Rebecca McAndrew, and Donna Muncey; Toward a Human Capital Development Strategy: Uncovering the Approaches Used by a High School Principal to Support Teacher Learning - Shelby Cosner; The Complexity of Gender-Role Stereotyping Effects in High School Principal Selection - Diana G. Pounder, Deborah King, Charles Hausman, and W. Bryan Bowles; Some Current Threats to Humanistic Pupil Control - Roger C. Shouse. Measuring Organizational Citizenship of Schools: The OCB Scale - Michael F. Dipaola, C. John Tarter, and Wayne K. Hoy; About the Contributors.