In the 72-class school, 43 classrooms and 54 teachers are required, in addition to the provision for auditorium, playrooms, and library. For this work 10 teachers are required, making a total of only 64 teachers for 72 classes. The traditional elementary school requires 72 teachers and 72 classrooms for 72 classes; the manual-training shops and the manual-training teachers are extra. In addition there would be librarians in branch public libraries, playground directors in public playgrounds, and special teachers as supervisors of music, drawing, physical training, manual training, and nature-study. Often in the traditional school 80 or more persons are employed for the instruction of 72 classes, not including the building principal and assistants. An important feature of the teacher organization in the Gary school is the division into senior and junior teachers, or head teacher and assistant teacher. Since each classroom accommodates two teachers according to the duplicate-school plan, the teacher who has been longer in service is designated as head teacher. The less experienced teacher acts under her direction. The head teachers, for instance, in the “X” school may visit and criticize the work of the assistant teachers in the “Y” school during the last hour of the day when the “X” school is not in session. Similarly the junior teacher in the “Y” school may visit the work of the “X” school during the first hour. Inexperienced or weak teachers may thus be developed under the direction of the more experienced. New teachers are thus being constantly trained in the new régime and spirit of the Gary school. The school is thus made an extension of the normal or training-school for teachers. The teachers continue to learn as well as the pupils. The question how teachers are to be procured for the new demands which the Gary plan puts upon them is thus answered. The school itself trains the teachers.