This practical resource highlights the critical importance of diagnosis and design in the work of leading and managing for school improvement. The authors maintain that today's school leaders and managers, under intense pressure to improve student learning, cannot simply adopt and implement pre-packaged reforms manufactured outside the school. Rather, to effect real reform, they must understand how leading and managing for instructional improvement gets done in their school and in turn use their diagnoses as the basis for mindful design and redesign. This book is a must-read for school administrators, teachers, stakeholders, and reformers who seek a new way to improve teaching and learning.