Personnel turnovers can create instability for students, schools, and school districts. What are the costs of these changes? What are the causes of these changes? What information can research contribute to understanding the situation? In October 2006, the National Commission on Teaching and America’s Future (NCTAF) invited 40 leaders in education, research, math, and science to discuss these issues. A number of significant points emerged from the NCTAF symposium and areas where additional research is needed were identified. This article outlines the findings of the symposium and describes five recommendations for future research on teaching quality in math and science.