This book, comprising seven chapters, describes the TTT (Trainers of Teacher Trainers) program at the national and local levels, discusses some concerns of the program, and describes the impact of the program on individuals and institutions. Chapter 1 provides background information, including definitions and a review of TTT at the national and local levels. Chapter 2 discusses the development of the national program and identifies its impact on one local project. Chapter 3 considers the Indiana Project in some detail and examines process and program dimensions, reporting on failures as well as successes. Chapter 4 discusses the issues and problems that arose in the implementation of the local projects and indicates the strategies employed for dealing with them. Chapter 5 and 6 report the results of the program in individual and institutional terms. Chapter 7 offers recommendations to federal agency personnel, local project personnel, and other local agency personnel for the planning, funding, and conduct of experimental field-based programs in teacher education. A 15-item bibliography is included. (Authors/PD)