Improving the quality of teaching in elementary and secondary schools is now high on the nation's educational policy agenda. Policy makers at the state and federal levels have focused on initiatives designed to improve the abilities of teachers already in schools and increase the numbers of well-qualified teachers available to fill current and future vacancies. Tests and Teaching Quality is an interim report of a study investigating the technical, educational, and legal issues surrounding the use of tests for licensing teachers. This report focuses on existing tests and their use.