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| Elementary School Mathematics | 1 |
| Formal Operations | 1 |
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| Shemesh, Michal | 1 |
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Shemesh, Michal – 1988
A nonequivalent control group design study, with a math unit on ratio and proportion as the treatment, was conducted to examine the validity of some written tasks as a measure of formal reasoning. Subjects in the study were 68 fifth grade students who enrolled in two classes in a small urban school. The experimental group learned a 12-lesson math…
Descriptors: Elementary School Mathematics, Formal Operations, Grade 5, Intermediate Grades
