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Excerpt from Relation of Sectioning a Class to the Effectiveness of Instruction General plan of the experiment. If. It were possible to secure three groups of classes so that all factors which affect the results of instruction were equivalent in the beginning of the experiment and could be controlled throughout the experimental period, the simplest procedure would be to have one group of classes taught as a unit, another group taught in two sections and a third group in three sections. However, it would be difficult, if not impossible, to secure exact equivalence of teaching ability and of pupil material. Our facilities for measuring the ability of teachers are extremely crude and at best it would be difficult to demonstrate that any differences found in the results of instruction were not produced largely by difi'erences in teaching ability. It is true that we have a number of general intelligence tests which might be used to measure the quality of the pupil material. However, the limitations of these instruments are such that one would be unable to interpret small differences in the resulting achievements. In order to avoid these two difficulties this experiment was planned 80 that the same teacher should instruct a given class when organized according to two different plans Of sectioning. This, necessarily, must be done during successive semesters. This proce dure insured the constancy of the teacher, although not necessarily of teaching ability Since the ability Of a given teacher may vary from semester to semester with different types of class organization. In order that the pupil material might be the same for the two plans of class organization one hundred percent promotion was secured at the middle of the school year. Thus, a teacher who instructed a class as one section during the first semester Of this experiment instructed the same pupils during the second semester but with the class divided into two or three sections. Other teachers taught classes organized according to other combinations of sectioning. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

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