[74] Measuring the Work of the Public Schools, pp. 75-77. Cleveland Education Survey. Published by the Survey Committee of the Cleveland Foundation, Cleveland, Ohio, 1916.
[75] Quality on vertical scale, speed on horizontal scale. The four schools referred to in the text are represented in the four diagrams in the upper part of the figure. North Doan is reported in the diagram in the upper left-hand corner. Kentucky is shown in the upper right-hand corner. Memorial is under North Doan. Mt. Pleasant is under Kentucky.
[76] William S. Gray, “A Co-operative Study of Reading in Eleven Cities of Northern Illinois.” Elementary School Journal, Vol. XVII, No. 4 (December, 1916), pp. 250-257.
[77] David A. Ward, The History of Physics Instruction in the Secondary Schools of the United States. Unpublished thesis for the Master’s degree in the Department of Education of The University of Chicago.
[78] E. R. Breslich, “Supervised Study as a Means of providing Supplementary Individual Instruction.” Thirteenth Yearbook of the National Society for the Study of Education, Part I, p. 45. The University of Chicago Press, 1914.
[79] F. M. Giles, late principal of the Township High School of De Kalb, Illinois. Thirteenth Yearbook of the National Society for the Study of Education, Part I, pp. 57-58.
[80] I. M. Allen, “Experiments in Supervised Study.” School Review, Vol. XXV, No. 6 (June, 1917), pp. 401-404.
[81] W. S. Deffenbaugh, “School Administration in the Smaller Cities.” Bulletin No. 44, United States Bureau of Education, 1915, pp. 40-41.
[82] Max F. Meyer, “The Administration of College Grades.” School and Society, Vol. II, No. 43 (October, 1915), pp. 577-589.
[83] See article by W. A. Bailey, School Review, Vol. XXV (May, 1917), pp. 305-321.