Integrating High School and College The Six-Four-four Plan at WorkLeonard V. Koos · First published 1946Open the Tome
Administering the secondary schoolLeonard V. Koos, James M. Hughes, Percival W. Hutson, William C. Reavis · First published 1940Open the Tome
Programs of guidanceWilliam Claude Reavis, William John Cooper, Leonard V. Koos, Carl A. Jessen · First published 1933Open the Tome
The reorganization of secondary educationFrancis T. Spaulding, Orie Isaac Frederick, Leonard V. Koos, William John Cooper, Carl A. Jessen, United States. Office of Education · First published 1933Open the Tome
Nonathletic extracurriculum activitiesWilliam Claude Reavis, William John Cooper, Leonard V. Koos, United States. Office of Education · First published 1931Open the Tome
Secondary education in CaliforniaLeonard V. Koos, California State Department of Education · First published 1929Open the Tome
