 Between 1923 and 1930, Birmingham passed two major bond issues to construct dozens of schools; today, the majority of Birmingham's 70 schools were built during Glenn's 1920s building program.Glenn also pushed for significant expansion of educational opportunities for African Americans, particularly in the area of vocational education, a position which earned him the enmity of the Ku Klux Klan.In 1937, Glenn was elected president of the National Education Association, and also served as the head of the American Association of School Administrators.