This book examines a policy that is one of the most powerful levers to improve teaching quality and advance teaching as a profession. Jennifer Goldstein presents the story of Rosemont, an urban district in California that created "professional accountability" with peer assistance and review (PAR), an alternative approach to teacher evaluation in which expert teachers evaluate their teacher peers. It challenges a number of long-held beliefs and practices in education--adversarial labor relations, "being nice," hierarchy, isolation, and negligence--to achieve very different teacher evaluation outcomes. This timely and accessible volume: