基于认知结构测查的化学概念学习评价——以“化学键”为例

Evaluation of Chemical Bond Learning Based on Cognitive Structure Test

通过流程图法对高中生“化学键”认知结构测查的结果表明:在“化学键”概念的学习过程中,多数学生在建构知识的过程中注重对概念文字表述的记忆,而欠缺对相关概念内涵的深层次理解,尤其对“化学键”相关概念中所蕴含的化学学科观念较为忽视,认知困难主要表现在“离子键与共价键的本质”“离子键的形成过程”等内容中.

The results of cognitive structure test of senior high school students’ about"chemical bond" by using the flow map showed that: In the learning process of "chemical bond"concept, most students paid attention to the memory of conceptual words in the process of constructing knowledge, and ignored chemical concepts embodied in the concept of chemical bond,which led students to lack deep understanding of the connotation of related concepts. Cognitive difficulties were mainly manifested in the nature of ionic bond and covalent bond, and formation process of ionic bond, etc.