At the heart of the secondary teacher education collaboration between the East Longmeadow School District (Massachusetts) and the University of Massachusetts at Amherst are the faculty at East Longmeadow High School and Birchland Park Middle School who have prepared to be mentors for student teachers. This volume contains reflections by these teachers about their experiences as mentors and the process of developing a professional development school. In addition, it contains statements by university faculty, a school district administrator, principals, and student teacher interns associated with the clinical site. Included in the volume are the sections: "Perspectives on the Need for Improved Teacher Development: Mentoring in a Professional Development School"; "Teachers As Mentors"; "Specific Components of a Mentoring Program in a Professional Development School"; "Impact of Mentoring in the Professional Development School Setting"; and "How to Begin a Mentoring Program." Appendices include a bibliography listing 26 references, a review of literature on the mentor role in teaching, and a report on a 1988 summer conference on mentoring. (IAH)