Now, more than ever, we understand the need for effective school leadership and its importance to successful educational reform that results in improved student achievement. This book presents a model of school leadership, developmentally responsive leadership, and provides middle school principals with a tool to assess their effectiveness and level of developmental responsiveness to their students, faculty, and school. These data are important for self-improvement and professional development as a school administrator, but also for their ability to highlight the role of the principal in the school improvement process.