分子是不够的! 克服学生的过度概括倾向通过比较和对比
1Institute for Research on Learning and Instruction, ETH Zürich, Clausiusstrasse 59, CH-8092 Zürich. adrianzwyssig@ethz.ch.
Chimia
|December 4, 2023
概括
学生们经常过度概括化学结合概念,错误地将分子物质特征应用于离子化合物. 同时介绍所有三种化学键类型有助于学生区分它们,提高理解.
科学领域:
- 化学教育的化学教育.
- 化学结合概念的化学结合概念
- 学生的误解 学生的误解
背景情况:
- 学生们经常与化学结合作斗争,通常认为所有物质都有分子结构.
- 这种困难的一个关键原因是过度概括,学生错误地将熟悉的分子物质的特性转移到不太熟悉的概念,如离子化合物.
研究的目的:
- 调查学生理解化学结合的过度概括倾向背后的原因.
- 提出和评估一个教学解决方案来解决这些常见的误解.
主要方法:
- 该研究讨论了学生在化学中的过度概括的原因.
- 它提出了一种基于比较和对比类似概念的教学方法.
- 这种方法涉及同时引入三种主要类型的化学键 (离子,共价,金属).
主要成果:
- 之前已经证明,比较和对比类似的概念可以提高学生区分它们的能力,正如数学教育中所示的那样.
- 同时引入不同类型的化学结合被假设可以有效地打击学生的过度概括倾向.
结论:
- 过度概括是理解化学键的重要障碍,特别是分子和离子化合物之间的区别.
- 一个比较和对比的教学方法,引入所有的纽带类型一起,提供了一个有希望的解决方案,以提高学生的概念清晰度和减少化学的误解.
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