The following discussion and analysis of the elements of the supervisory process, and statement of the technique and professional standards for the supervision of instruction, will be read with interest by those who are concerned with the work of school supervision. The fundamental purpose of all school supervision is to increase the efficiency of the classroom teacher. For a supervisor to be constructively critical and helpful requires a good understanding of both the purposes and the technique of supervision; and the fundamental principles and methods underlying such helpful and constructive service the author of the present volume has here set forth.