The present American philosophy of education proclaims equality of opportunity for every child. This requires a study of the inherent capacities of children and the consideration of the opportunities for service in a highly complex industrialized society. The Office of Education is now engaged in studying the success of the types of curriculum and methods of teaching, as well as the administrative plans used to reduce the per capita cost of educating the handicapped. This bulletin presents data concerning the number of such schools and classes, the number of pupils enrolled in each, and the number of teachers and other employees required to conduct such schools and classes. The study was conducted in cities with a population of 10,000 or more. According to 1920 census data, there were 762 cities that qualified, and replies were received from 736 of these locations. For the purposes of this study, special education is defined as the education of those children who for various reasons can not be taught properly in regular school classes--public, private, or parochial. Specifically, this report deals with parental and open-air schools; disciplinary, industrial, and trade classes; with classes for children who are blind, deaf, hard of hearing, crippled, gifted, sub-normal, overage, ungraded, epileptic, non-English-speaking, sub-normal and overage, and overage and ungraded, as well as with classes for children with defects in vision or speech. (Contains 13 tables.) [Best copy available has been provided.]