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Development of Arithmetic Computation and Number Conservation Skills.
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Bisanz, Jeffrey – 1989
The cutoff method was used on longitudinal data in more than one content domain in a study attempting to determine whether the effects of schooling are general or limited. Conservation of number, an informally acquired skill, and mental addition, a formally acquired skill, were evaluated among older kindergarten children, younger 1st-grade…
Descriptors: Addition, Age Differences, Cognitive Development, Conservation (Concept)