Presented in an updated new edition, this textbook establishes for the first time a general theory of instrumental teaching, describing aims, learning contents and teaching methods on interdisciplinary lines and providing a wealth of detailed practical suggestions. The reader gets essential information on the creation of the teacher-pupil relationship, body language behaviour in the lessons and the encouragement of learning processes. Instrumental group lessons are dealt with in a detailed chapter. The book thus presents the central aspects of educational professionalism in a comprehensive manner.