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The variability of children of different ages and its relation to school classification and grouping,

By Cornell, Ethel Letitia,.
Albany, The University of the state of New York, 1937 .
98 p. 23 cm..

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Educating the more able children in grades four, five, and six.

By Lewis, Gertrude Minnie,.
U.S. Dept. of Health, Education, and Welfare, Office of Education 1961 .
vi, 84 p. : , Copies 1 and 3 of L111.A6 bound with: Bulletin / United States. Office of Education, 1961, no. 2-1961, no. 8, subsequent to publication. 23 cm..

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Survey of research on grouping as related to pupil learning /

By Franseth, Jane..
Washington : U.S. Dept. of Health, Education, and Welfare, Office of Education : | [for sale by the U.S. Government Printing Office], 1966 .
64 p. ; 26 cm..

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