This book examines policy issues, projection models, and data bases pertaining to the supply of, demand for, and quality of teachers in the United States from kindergarten to twelfth grade. It identifies additional data needed to clarify policy issues or for use in projection models, with a long-range view of contributing to the development of a teaching force of higher quality in the United States. The book has major implications for the teacher work force and for statisticians and researchers involved in investigating, modeling, and projecting teacher supply, demand, and quality.