Published each school year ending in an even number.
Prepared by: Division of Statistics, Bureau of Education, 1917/1918-1925/1926; by: Division of Statistics, [Office of Education], 1927/1928-1935/1936; by: Elementary-Secondary Education Surveys Section, Division of Educational Statistics, <1961/1962>; by: Elementary-Secondary Studies Branch, National Center for Educational Statistics, 1963/1964-<1965/1966>; by: National Center for Educational Statistics, 1971/1972-1973/1974.
Issued as a chapter in the Biennial survey of education, 1917/1918-1957/1958.
Preliminary statistics occasionally released with same title as Office of Education circulars, <1939/1940>-<1958/1959>, or with title: Preliminary statistics of state school systems, 1933/1934-1969/1970.