Student teachers have always worked with professionals during their teaching practice, but as teacher training becomes more school based, the role of the mentor has become much more important. Even newer is the emergence of the subject mentor. This book is an examination of the nature of effective mentoring and its contribution to student teacher development. The book has a broad perspective, examining policy developments and differing approaches to teacher education. Central issues are explored in subject mentoring such as collaborative teaching, observation and the practice of discursive mentoring.