Promoting understanding of chemical representations: Students' use of a visualization tool in the classroom

Hsin Kai Wu*, Joseph S. Krajcik, Elliot Soloway

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

365 引文 斯高帕斯(Scopus)

摘要

Many students have difficulty learning symbolic and molecular representations of chemistry. This study investigated how students developed an understanding of chemical representations with the aid of a computer-based visualizing tool, eChem, that allowed them to build molecular models and view multiple representations simultaneously. Multiple sources of data were collected with the participation of 71 eleventh graders at a small public high school over a 6-week period. The results of pre-and posttests showed that students' understanding of chemical representations improved substantially (p<.001, effect size = 2.68). The analysis of video recordings revealed that several features in eChem helped students construct models and translate representations. Students who were highly engaged in discussions while using eChem made referential linkages between visual and conceptual aspects of representations. This in turn may have deepened their understanding of chemical representations and concepts. The findings also suggest that computerized models can serve as a vehicle for students to generate mental images. Finally, students demonstrated their preferences of certain types of representations and did not use all types of three-dimensional models interchangeably.

原文英語
頁(從 - 到)821-842
頁數22
期刊Journal of Research in Science Teaching
38
發行號7
DOIs
出版狀態已發佈 - 2001 九月
對外發佈

ASJC Scopus subject areas

  • 教育

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