Book excerpt: Supporting teacher learning is a complicated and challenging task. This much-awaited book offers a practical, research-based framework for thinking about instructional leadership, along with the necessary resources and tools for improving practice. The authors identify specific structures, formats, and strategies that an instructional leader can use to support new and veteran principals and teacher leaders. They then discuss ways to think about which structures are most appropriate for particular settings, offering suggestions on the most effective way to work with these structures. This unique book combines theory with best practices to create a vision of how 21st-century instructional leaders can improve education for all students.