Each of the 31 models included in this volume is supported by practical details and focuses on four main aspects of a specific peer-assisted learning environment: implementation, evidence of effectiveness and learning benefits, analysis of time and cost expenditures, and suggestions for replication. Contents include discussions of working with undergraduate partners in several areas: The chapters present a range of approaches, applications, disciplines, institutions, and contexts, and demonstrate that student-faculty partnerships can be adapted to meet diverse needs in a variety of situations. Extensive appendices aid implementation by providing concrete examples of hiring documents, training syllabi, teaching materials, and evaluation methods.