The educational directories for 1926, 1927, 1928, 1929, and 1930 United States Bureau of Education cover some of the following categories: principals and superintendents of state schools, county and other local schools, and public schools in cities and towns; public school business managers; presidents of universities, colleges, and junior colleges; heads of departments of education; presidents or deans of various schools within universities; presidents of institutions for the training of teachers; directors of summer schools; educational boards and foundations; church educational boards and societies; Jewish educational organizations; superintendents of Catholic parochial schools; directors of schools for social workers; international and American associations of education; National Congress of Parents and Teachers; and educational periodicals.