At least sixteen US states have taken steps toward holding teacher preparation programs (TPPs) accountable for teacher value-added to student test scores. Yet it is unclear whether teacher quality differences between TPPs are large enough to make an accountability system worthwhile. Several statistical practices can make differences between TPPs…

The well known 1983 report "A Nation at Risk" recommended that individuals preparing to teach should meet high education standards and demonstrate an aptitude for teaching and competence in an academic discipline--adding also that college and university teacher preparation programs should be judged by how well their graduates meet these…

States are in various stages of reforming how they evaluate their educators, all striving for a new system that can assess a range of abilities and practices over long periods of time and capture the full nature of an educator's performance. The strongest systems look at teaching in a more comprehensive way than evaluations have done in the past,…