The development of the concepts of ratio and fraction in the fourth, fifth, and sixth years of the elementary school / by Leslie P. Steffe and Robert B. Parr.
- Madison, Wisconsin Research and Development Center for Cognitive Learning, University of Wisconsin, 1968.
xi, 43 p. illus. 28 cm.
- Fractions -- Study and teaching.
Ratio and proportion -- Study and teaching.
Mathematical ability -- Testing.
Mathematics -- Study and teaching (Elementary) -- Wisconsin.
- "Report from the Mathematics Concept Learning Project. Henry Van Engen, principal investigator.".
Bibliography: p. 43.
- Parr, Robert B. joint author.
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