After deducting holidays, the annual school term in most American cities is not more than 180 days. In many cities and towns the number of actual school days is still less. This means that children who are never absent attend school less than half the days of the year, a little more than 1 hour in 10. Formerly the school year was much longer in the cities of this country, as it is now in most other countries. In recent years school officers and the people generally are beginning to feel that there is no need for the very long summer vacation, and that some opportunity should be offered for such children as will make better use of it than loafing on the streets. This has resulted in many cities in some form of summer school. The study, the results of which are presented in this bulletin, was made for the purpose of determining the extent of this movement for summer schools in the cities of the United States and summarizing the results. (Contains 14 tables and 2 footnotes.) [Best copy available has been provided.]