基于学习进阶理论和认知模型建构的化学教学研究——以人教版选修5“卤代烃”为例

Research on Chemistry Teaching Based on Learning Progression Theory and Cognitive Model——Taking "halogenated hydrocarbon" in elective for example

基于学习进阶理论划分化学核心内容的学习周期、阶段要求与认知层级是当前化学教学研究热点。基于SOLO分类理论探讨有机物进阶学习的途径,建构由反应类型、物质变化、影响因素、反应选择性4要素组成的认知模型,包括基于具体物质、官能团、化学键3层级。在人教版卤代烃教学中融入模型建构,按照理论铺垫、预测性质、实验验证、归纳提升、性质迁移5环节进行教学。

The learning cycle,stage requirement and cognitive level of chemical core content based on learning progression theory are research hotspots in current chemistry teaching.Based on the SOLO classification theory,the advanced learning stage of organics is discussed,and a cognitive model consisting of four elements,such as reaction type,matter change,influence factor and reaction selectivity,is constructed,which is based on the three levels of specific substances,functional groups and chemical bonds.In the teaching of halogenated hydrocarbon published by people's education press of China,we integrate the model construction,and carry out teaching in accordance with the five segments of theoretical foreshadowing,property prediction,experimental verification,conclude and upgrading,and nature migration.