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Peabody Picture Vocabulary…1
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Henning, C. Wallis – 1968
The purpose of this study was to determine whether or not systematic verbal positive reinforcement administered by two relatively unsophisticated teachers would favorably affect students' achievement scores. Two kindergarten and two first grade classes served as the experimental population with ten students from each class and one teacher from…
Descriptors: Academic Achievement, Achievement Gains, Analysis of Variance, Grade 1