Investigating the mangle of teaching oxidation–reduction with the VisChem approach: problematising symbolic traditions that undermine chemistry concept development

Investigating the mangle of teaching oxidation–reduction with the VisChem approach: problematising symbolic traditions that undermine chemistry concept development
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使用 VisChem 方法研究氧化还原教学的混乱:对破坏化学概念发展的象征传统提出问题

DOI:
10.1039/d2rp00321j
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发表时间:
2023
影响因子:
3
通讯作者:
Yezierski, Ellen J.
Yezierski, Ellen J.
中科院分区:
教育学2区
文献类型:
--
作者:
Wu, Meng-Yang M.;Yezierski, Ellen J.

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具体到氧化还原(氧化还原)的主题,教师有义务优先考虑符号传统,如写方程,记录氧化状态,并描述变化(例如,其经历氧化/还原)。虽然化学教育研究界赞同连接的顶点约翰斯通的三角形,如何象征性的传统破坏化学概念的发展,特别是在课程规划和教学,是未充分探讨。为了澄清这一差距,我们使用实践框架的撕裂,以解开符号与颗粒为重点的教学之间的冲突。我们调查教师(n = 3)的共同规划和微教学的氧化还原学习设计在VisChem研究所-2使用叙事方法和视频研究方法。我们的研究结果表明,传统的氧化还原指令是有问题的根深蒂固的化学符号。记忆术、单一取代反应方案和书面净离子方程都以各种方式限制了以化学机制和因果关系为重点的教学。我们断言,氧化还原知识的性质,在什么是值得教和学方面,必须首先重新评估的改革为基础的努力取得成功。对中学和大学化学教学和研究的影响和建议进行了讨论。
Specific to the topic of oxidation–reduction (redox), teachers are obligated by the discipline to prioritise symbolic traditions such as writing equations, documenting oxidation states, and describing changes (e.g., what undergoes oxidation/reduction). Although the chemistry education research community endorses connecting the vertices of Johnstone's triangle, how symbolic traditions undermine chemistry concept development, especially during lesson planning and teaching, is underexplored. To clarify this gap, we use the Mangle of Practice framework to unpack the clash between symbolic vs. particulate-focused instruction. We investigate teachers’ (n = 3) co-planning and micro-teaching of a redox learning design at the VisChem Institute-2 using a narrative approach and video research methods. Our results show that the traditions of redox instruction are problematically entrenched in chemistry symbols. Mnemonics, the single replacement reaction scheme, and the written net ionic equation all constrain instruction focused on chemical mechanism and causality in various ways. We assert that the nature of redox knowledge in terms of what is worth teaching and learning must first be re-evaluated for reform-based efforts to succeed. Implications and suggestions for chemistry teaching and research at both secondary and tertiary levels are discussed.
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