This book focuses on seven important dimensions of principalship: data-informed decision-making; safe and orderly school operation; high, cohesive, and culturally relevant expectations for students; distributive and empowering leadership; coherent curriculum; real-time and embedded instructional assessment; and commitment and passion for school renewal. For each dimension, it provides a research base, best practices, and relevant tools. The book is particularly useful for researchers, policy makers, and educational leadership faculty members as well as, of course, principals.