Promoting Conceptual Understanding of Chemical Representations: Students' Use of a Visualization Tool in the Classroom

Abstract

This study investigates how students develop their understanding of chemical representations with the aid of a visualizing tool, eChem, that allows them to build molecular models and view multiple representations simultaneously. Multiple sources of data were collected with the participation of 71 eleventh graders in a high school over a six-week period. The results of the pre- and post-tests show that students understanding of chemical representations improved substantially (t=13.9, p<.001, effect size = 2.68). The analysis of video recordings reveals that several features in eChem helped students construct models and translate representations.

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