[34.] Caldwell, O.W. "Laboratory Method and High School Efficiency," Popular Science Monthly, 82-243.
[35.] King, Irving. The High School Age.
[36.] Book, W.F. "Why Pupils Fail," Pedagogical Seminary, 11:204.
[37.] Bronner, A.E. The Psychology of Special Abilities and Disabilities, p. 6.
[38.] Lewis, W.D. Democracy's High School, pp. 28, 37.
[39.] Hanus, P.H. School Aims and Values.
[40.] Russell, J.E. "Co-education in High School. Is It a Failure?" Reprint from Good Housekeeping.
[41.] Dotey, A.I. An Investigation of Scholarship Records of High School Pupils. High School Teachers Association of New York City. Bulletins 1911-14, p. 220.