Incorporating both theoretical and practical perspectives, this volume of papers explores varied aspects of peer review of teaching in higher education. The section on theory features contributions from academics based in Europe, North America and Australia. It provides a number of models demonstrating ways in which collegial peer commentary can enhance the quality of learning and teaching. The chapters examine in detail the importance of communication and leadership, and deploy evidence from one-on-one interviews that evince the value of considering collegiality, emotions, attitudes, and spaces in peer review.