This technical supplement provides details on the survey methodology and results presented in the report "Developing Effective Principals: What Kind of Learning Matters?" The full report shows that principals' access to high-quality learning opportunities varies across states and by school poverty level. To draw these conclusions, the…

A substantial and growing body of research suggests that strong school leadership is critical for shaping productive learning environments, supporting high-quality teachers and teaching, and influencing student outcomes. But what characteristics contribute to high-quality principal preparation programs and learning experiences? And to what extent…

Preparation and professional development can help principals be more effective leaders, but little research has examined what specific approaches are most useful. A study of 462 California principals and the teachers and students in their schools shows that high-quality preservice preparation for principals is associated with stronger teacher…

A growing body of research points to the substantial influence of principals on school conditions and students' learning. But how can principals learn to be good leaders? And are there professional learning strategies that make a difference in principal effectiveness? This study, which is part of a larger project synthesizing the research on…