Physicians, particularly consultants, are frequently placed in teaching and training positions. Many doctors are teaching medical students in medical schools and training residents in teaching and university hospitals. In addition, many doctors have an obligation to the development of their students, trainee, and their organizations. Therefore, the principles and concepts of development have become increasingly relevant to doctors running hospitals, medical schools and other health institutions and centers. This textbook book is a useful compendium of the conceptual structure of training and its methodologies. This book serves well as a source of information to help doctors in training their less senior colleagues in different medical and clinical settings. In addition to enabling the essential understanding of the conceptual background of the process of training in general and training of trainers, this book can also help in optimizing the effectiveness of the training designed to build a potential cadre of trainers.