Field-based experiences are essential to develop preservice teachers' effective instruction skills. However, it is difficult for many teacher education programs to provide frequent field observations. Peer coaches can enhance field-based experiences by observing and recording the performance of their peers, providing feedback on observed teaching behaviors, and helping preservice teachers correct errors and improve instruction. This article reviews six peer coaching studies and discusses factors that are important to consider when using peer coaches to supervise preservice teachers during field-based experiences.