Assuming the quality of the principal is directly linked to student learning and instruction, whose responsibility is it to develop building administrators to their fullest? This question is at the center of Principal Training on the Ground by Sandra Stein and colleagues from the School of Public Affairs at Baruch College of the City University of New York resulting from their work in New York City's School District 2. The quest was to find strong principals to improve student achievement. The district created the Aspiring Leaders Program. Stein and her co-author, Liz Gewirtzman, base this book on the program's collaboration between several New York City districts and the public affairs school at Baruch. The intent was to develop a unique principal development program integrating the theoretical knowledge and research of college professors and the practical knowledge of master practitioners in the schools. This article describes the Aspiring Leaders Program.