Ingersoll, Richard2023-05-222023-05-222007-09-012007-10-22https://repository.upenn.edu/handle/20.500.14332/34871Few education issues have received more attention in recent times than the problem of ensuring that all elementary and secondary classrooms are staffed with high-quality teachers. This concern with teacher quality is not surprising. Mandatory elementary and secondary schooling in the United States places children in the care of teachers for a significant portion of their lives. The quality of teachers and teaching is undoubtedly an important factor in shaping students' growth and learning.Policy and AdministrationArticle