基于模型认知的板块-任务式化学课堂教学设计——以“金属的腐蚀与防护”为例

Model-cognition-based design of block-task chemistry classroom instruction—Taking“corrosion and protection of metals”as an example

“金属的腐蚀与防护”是普通高中化学课程重要内容,基于发展学生“模型认知”化学学科核心素养理念,以“西气东输”大国工程为背景,基于“西气东输”管道防腐问题的STSE真实情境,通过三大板块统整教学内容,设计层层深入的探究性学习任务,驱动学生探究金属腐蚀原理,自主建构金属腐蚀的分析和防护模型,促进学生深度学习,发展化学学科核心素养.通过“金属的腐蚀与防护”教学案例,揭示基于模型认知的板块-任务式教学设计的有效策略,为实施“素养为本”的化学课堂教学提供借鉴.

“Corrosion and protection of metals”is an important content of the general high school chemistry curriculum.Based on the concept of developing students’core literacy of“model cognition”,select the STSE real situation of the anti-corrosion problem of the gas pipelines with the background of“West-to-East Natural Gas Transportation Project”,the teaching content is integrated through three blocks.Through the progressive and exploratory learning tasks,students are inspired to explore the principles of metal corrosion and construct the analysis and protection model of metal corrosion independently,which promotes students’in-depth learning and cultivates the core literacy in chemistry.By analyzing the teaching case of“Corrosion and protection of metals”,it reveals the effective strategies of the block-task-based teaching design based on model cognition,and provides reference for the implementation of“quality-oriented”chemistry classroom teaching.