KMID : 1059520110550030519
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Journal of the Korean Chemical Society 2011 Volume.55 No. 3 p.519 ~ p.528
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The Development of a Learning Program for Enhancing the Skills of Control Variables and the Effects of Its Applications
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Lee Yoon-Ha
Kang Soon-Hee
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Abstract
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The main purpose of this study was to develop a teaching program, especially designed to improve the skills of control variables. The secondary purpose was to investigate the effect of the program on enhancing students¡¯ scientific reasoning and understanding. The program was designed based on the 3-step learning model: i.e. students recognize the necessity of controlling the variables (step 1), perform their own experiments (step 2), and reflect on their variables control process (step 3). The program included 9 topics of increasing difficulty. In results, Lawson¡¯s SRT scores increased in both experimental and control groups after application of the program, but the difference was not statistically significant. After the application, there was an increase in type A and type B which implied that students¡¯ skills of control variables was improved. In addition, responses of students in the experimental group to the open-ended items showed that it was challenging for them to think scientifically and critically when controling variables, but they ended up feeling proud of their achievement after the program.
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KEYWORD
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Skills of control variables, Model of enhancing the skills of control variables, Type of control variables
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