Michael Fullan is an international expert on educational change who has written extensively on the topic. According to Fullan, successful change involves improving relationships, using professional learning communities to spread best practices, and developing teacher and principal leadership. At the district level, focused professional development, supportive policies for low-performing schools, and addressing workload and pressure on principals can improve student achievement outcomes. Fullan's work provides a framework for understanding the different levels involved in creating and managing educational change.