走进真实情境的初中化学教学——溶液的形成

Junior High School Chemistry Teaching in Real Situation:Formation of Solution

“溶液的形成”是初中化学学习物质的多样性的典型性内容。通过“制奶茶—探奶茶—品奶茶”3个环节使学生设计实验,运用手持数字化实验、模型示意图等多种手段,观察、比较、分类、推理,从多角度认识溶液,建构溶液的宏观特征与微观本质的关联。在真实的生活情境中转变实验策略,改变学习方式,完成具有挑战性的任务,逐步加深对溶液这一核心知识的理解和迁移应用。在“做中学”“用中学”中领悟学科观念、方法和价值。

“Formation of solution”is a typical content of the diversity of substances in junior high school chemistry.Through three links of“making milk tea-exploring milk tea-tasting milk tea”,this paper enables students to design experiments,observe,compare,classify and reason by means of hand-held digital experiments,model sketches and other means,understand solutions from multiple angles,and construct the relationship between the macro characteristics and micro essence of solutions.In real life situations,this paper changes experimental strategies and learning methods,completes challenging tasks,and gradually deepens the understanding and transfer application of the core knowledge of solution,comprehends the concept,method and value of discipline in“learning by doing”and“learning by using”.