Supporting Knowledge Integration in Chemistry with a Visualization-Enhanced Inquiry Unit
Supporting Knowledge Integration in Chemistry with a Visualization-Enhanced Inquiry Unit
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DOI：
10.1007/s10956-013-9449-5
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发表时间：
2014-02-01
影响因子：
4.4
通讯作者：
Linn, Marcia C.
中科院分区：
文献类型：
--
作者：
Chiu, Jennifer L.;Linn, Marcia C.
本文介绍了一个以探究为导向的在线课程，利用动态分子可视化，以提高学生的化学反应的理解的设计和影响。可视化增强单元使用基于研究的指导方针，遵循知识整合框架，帮助学生通过连接和完善现有和新的想法来发展连贯的理解。探究单元支持学生发展化学反应的分子，可观察和符号表示之间的联系。基于设计的研究包括一项试点研究，一项研究比较可视化增强的查询单元，以典型的指令，以及一个课程的比较研究，具有延迟后测。参加视觉化增强单元的学生表现优于接受典型教学的学生，并进一步巩固了他们对延迟后测的理解。使用可视化增强单元的学生比使用典型教科书和基于讲座的教学的学生形成了更多的概念之间的联系。项目分析揭示了学生在学习课程时建立的联系类型，并建议这些联系如何使学生在继续学习化学课程时巩固他们的理解。结果表明，可视化增强的调查设计的知识整合，可以提高可观察到的和原子级的现象之间的联系，并为学生服务，以及他们在化学研究后续的主题。
This paper describes the design and impact of an inquiry-oriented online curriculum that takes advantage of dynamic molecular visualizations to improve students' understanding of chemical reactions. The visualization-enhanced unit uses research-based guidelines following the knowledge integration framework to help students develop coherent understanding by connecting and refining existing and new ideas. The inquiry unit supports students to develop connections among molecular, observable, and symbolic representations of chemical reactions. Design-based research included a pilot study, a study comparing the visualization-enhanced inquiry unit to typical instruction, and a course-long comparison study featuring a delayed posttest. Students participating in the visualization-enhanced unit outperformed students receiving typical instruction and further consolidated their understanding on the delayed posttest. Students who used the visualization-enhanced unit formed more connections among concepts than students with typical textbook and lecture-based instruction. Item analysis revealed the types of connections students made when studying the curriculum and suggested how these connections enabled students to consolidate their understanding as they continued in the chemistry course. Results demonstrate that visualization-enhanced inquiry designed for knowledge integration can improve connections between observable and atomic-level phenomena and serve students well as they study subsequent topics in chemistry.