A study of ability grouping in the elementary school in terms of variability of achievement : the teaching problem, and pupil adjustment

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タイトル: "A study of ability grouping in the elementary school in terms of variability of achievement : the teaching problem, and pupil adjustment"

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Reprint of the 1933 ed., issued in series: Teachers College, Columbia University. Contributions to education, no. 588

Originally presented as the author's thesis, Columbia

Bibliography: p. 69-70