This document is a bound volume of four U.S. Commissioner of Education reports, for the years 1918, 1919, 1920, and 1921, each ending June 30. Each report provides discussion and data on U.S. education across sectors and jurisdictions. Among topics covered across the four reports are: Higher education, the federal board for vocational education, vocational training in Army hospitals, the students' Army training corps, medical education and the war, teacher training, teachers organizations, educational extension, school hygiene and physical education, the public schools and the war, Americanization through education, educational legislation, rural education and school consolidation, teacher training, educational work of churches, library activities, city schools, education in U.S. territories and dependencies, education in foreign countries, education statistics, education legislation, agricultural education, vocational education, home economics, the United States school garden army, community organization, commercial education, school administration, education surveys, negro education, kindergarten education, home education, civic education, and the work of the Bureau of Education.