化学学历案促进深度学习的发生——化学平衡移动复习课

Chemistry Learning Plan to Promote the Occurrence of Deep Learning of Chemical Equilibrium Shift

学历案是关于学习经历或过程的方案,利用学历案构建一个“以学为主、以教促学”的教学模式,改变了教师的主导地位,凸显了学生的主体地位。笔者尝试借助学历案,以花青素为载体,通过生活化的化学实验,将化学平衡常数K作为分析工具,进行证据推理,以外界条件使花青素溶液颜色变化,到花青素的工业合成为明线;以化学平衡移动的本质到化学平衡移动原理的应用为暗线,双线结合,学生自主建构“化学平衡移动”的认知模型,从而促进深度学习的发生。

Learning plan is an improvement scheme about the learning experience or process.A teaching model of“focusing on learning and promoting learning through teaching”is built by using the learning plan.It has changed the dominant position of teachers and highlighted the dominant role of students.With anthocyanins as the carrier,through living chemical experiments and by using the chemical equilibrium constant K as an analytical tool,the author tries to evidence reasoning through the learning plan.In the review lesson,there are two lines for teaching and learning.The open line is from the color change of anthocyanin solution under external conditions to industrial synthesis of anthocyanins,and the dark line is from the essence of chemical equilibrium movement to application of chemical equilibrium moving principle.With the combination of two lines,students can independently construct their own cognitive model of“chemical equilibrium movement”,so as to promote the occurrence of deep learning.