In the February, 1968, Iowa Science Teachers' Journal the writer outlined a study in which students in Iowa and Illinois who were utilizing the CBA, CHEMS, and Modern Chemistry (MC) chemistry materials were to be studied to determine if these courses were meeting their common objectives equally.
Iowa Science Teachers' Journal
© Copyright 1969 by the Iowa Academy of Science
Troxel, Verne A.
"A Comparison of the Attainment of the Common Objectives of the CBA, SHEMS, and Modern Chemistry Courses as Reflected in Student Performance on Various Objective Measures,"
Iowa Science Teachers Journal: Vol. 7
, Article 4.
Available at: https://scholarworks.uni.edu/istj/vol7/iss2/4