This revised edition - based on Learning Forward's definition of professional learning and Standards for Professional Learning, which together offer district leaders a framework to guide daily decisions that promote continuous improvement - includes more intentional focus on the role of curriculum and instructional materials in a learning system. It emphasizes the importance of concentrating school- and team-based professional learning largely on the curriculum that teachers use with students. This focus reflects recent research that recognizes the power of a high-quality curriculum in improving student achievement. The book outlines the knowledge, skills, attitudes, dispositions, and behaviors district leaders need to lead, facilitate, and coach school leaders and leadership teams to embed the definition and standards into schools' daily routines as they integrate high-quality curriculum with professional learning.