Journal of Applied Developmental Psychology · 1997 · 330 citations · 27 references
Teacher EducationMathematics EducationLearning ObjectLearning SciencesEducationConcrete ObjectsNumerical CompetenceNew PerspectiveSymbol UseMathematics Teacher Education
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Rapid Change in the Symbolic Functioning of Very Young Children
Judy S. DeLoache · Science · 1987 · 581 citations