This study will examine the impact of the Learning and Teaching Geometry (LTG) professional development for secondary mathematics teachers on the teachers' knowledge and classroom instruction, as well as on their students' learning. As the nation invests vast resources in the professional development of teachers to meet new curriculum and instruction challenges, exploring the efficacy of professional development is important to understand how best to direct those resources.
The study includes two and a half years of preparation and support for all the mathematics instructional leaders (ILs) within a large urban school district with a substantial minority student enrollment. These ILs will implement the Problem-Solving Cycle model with the mathematics teachers in their schools. Researchers will analyze the preparation and support that ILs need, the quality of their implementation, and the impact of the PD process on ILs, teachers, and students.