Actions with manipulatives support second graders’ learning about place-value concepts
Abstract
The aim of the present study was to examine the impact of conceptual transparency of mathematics manipulatives used in instruction on the learning of place-value concepts in typically developing second graders (n = 88) and those at-risk for mathematics learning disabilities (n = 29). We randomly assigned the children of each classification to three instructional conditions that varied according to the extent to which place-value concepts were made visible in the objects’ perceptual features. In one condition, the ten and hundreds denominations were already grouped and the ones were visible in each denomination; in the second condition the denominations were already grouped but the ones were not visible; in the third condition, we provided children with individual beads that could be attached in groups of tens and hundreds. We assessed the accuracy of the children’s representations of two- and three-digit numerals using manipulatives and their place-value knowledge on symbolic tasks. Contrary to our expectations, we found that the manipulatives requiring children to construct their own denominations were related to gains in the accuracy of the physical representations, but not to gains on the symbolic measures. We speculate that the actions involved in constructing the denominations provided opportunities for children to encode the materials’ salient features in ways that led to the greatest benefits. We suggest that teachers ensure that students encode manipulatives used during instruction in meaningful ways.
Copyright (c) 2026 Helena P. Osana, Joel R. Levin, Anne Lafay

This work is licensed under a Creative Commons Attribution 4.0 International License.
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