‘Named Small but Doing Great’: An Investigation of Small-Scale Chemistry Experimentation for Effective Undergraduate Practical Work
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- 作者：Gebrekidan Mebrahtu Tesfamariam…
- 关键词：Effectiveness ; Practical work ; Small ; scale chemistry ; Undergraduate
- 刊名：International Journal of Science and Mathematics Education
- 出版年：2017
- 出版时间：March 2017
- 年：2017
- 卷：15
- 期：3
- 页码：393-410
- 全文大小：
- 刊物类别：Humanities, Social Sciences and Law
- 刊物主题：Mathematics Education; Science Education;
- 出版者：Springer Netherlands
- ISSN：1573-1774
- 卷排序：15
文摘
In theory, practical work is an established part of university-level chemistry courses. However, mainly due to budget constraints, large class size, time constraints and inadequate teacher preparations, practical activities are frequently left out from chemistry classroom instruction in most developing countries. Small-scale chemistry (SSC) experimentation in which one uses miniature chemical equipment can drastically reduce quantities of chemicals used during experimentation, which can help overcome some of the barriers preventing practical work in the chemistry classroom. This study evaluated the effectiveness of using miniature chemical equipment at the undergraduate level in increasing students’ understanding of chemistry concepts as well as in improving their attitude towards chemistry practical work. Two comparable groups of first-year students who enrolled for a Practical General Chemistry course participated. A quasi-experimental design was employed in which the experimental group (N = 49) used the SSC approach while the control group (N = 52) followed the traditional approach for over 8 weeks. Data were gathered using chemistry tests, attitude and perception questionnaires and interviews. Findings showed that the SSC approach was as effective as the traditional laboratory approach in improving students’ attitude towards practical work, but more effective in enhancing students’ understanding of chemistry concepts. More interestingly, SSC was positively accepted by both students and instructors as an effective strategy for teaching first-year undergraduate chemistry practicals. Some shortcomings of the approach were also identified.