During the decade 1920-1930 the number of nursery schools reported to the United States Office of Education increased from 3 to 262. This last number does not comprise the total number of nursery schools in the United States, but the increase from 3 to 262 in the number reported indicates their rapid growth. This evident interest in nursery schools is changing the general conception of school age. A new unit at the foot of the ladder of the educational program is being accepted. This unit reaches a step lower than the kindergarten in meeting the needs of a child's development and is one answer to the recurrent question, Where can one learn more about the care and education of young children? Two general trends are largely responsible for the development of nursery schools during the past decade. First, the general concern that each individual be given opportunity to start life fortified with adequate emotional controls and social adjustments that may obviate many of the present difficulties in adolescent and adult life. Second, the movement of population toward cities has placed certain social and economic limitations upon family life. There is a larger proportion of "only" children and of small families. The children need a substitute for the wholesome give and take which living with other children affords. This bulletin presents a composite picture of nursery-school procedures, an analysis of the administration and operation of 2003 nursery schools, and individual reports of the organization of 12 nursery schools sponsored by different types of institutions and representative of the different services offered. The study concludes with a description of the nursery school in publicly supported programs of education and welfare. This bulletin contains the following sections: (1) What is nursery-school education?; (2) A survey of the organization and operation of 203 nursery schools; (3) Organization and administration of five representative nursery schools; and (4) Nursery schools in pubic-school systems and publicly supported welfare institutions. Individual sections contain footnotes and references. [This bulletin was written in collaboration with Rowna Hansen. Best copy available has been provided.]