基于曲线问题情境的信息化教学尝试——以“沉淀溶解平衡”为例

An Attempt of Informatization Teaching Based on Curve Problem Situation:Precipitation Dissolution Equilibrium

基于高中生对实验曲线理解困难的现状,为挖掘实验曲线的教学价值,以沉淀溶解平衡为例,结合课堂演示实验和教学软件,设计了"宏观-微观-符号-曲线"多重表征教学为一体的实验探究课。根据沉淀溶解平衡实验证据,绘制实验曲线,构建微观模型和图像,从而培养学生的证据收集与应用意识,提高学生对曲线的分析和理解能力,领会各种变化曲线的来源。在曲线理解的基础上建立"溶解-平衡-转化"思维模型,以此为开展"曲线融入式"的问题引导型实验教学提供参考案例。

Based on the current situation of high school students’ difficulty in understanding the experiment curve, in order to tap the teaching value of the experimental curve, this paper took precipitation dissolution equilibrium as an example, designed an experimental inquiry course of "macro-micro-symbol-curve" multi-representation model through classroom demonstration experiments and teaching software. Based on the experimental evidence of precipitation dissolution equilibrium, the experimental curves were drawn, microscopic models and images were constructed, so as to cultivate students’ awareness of evidence collection and application, improve students’ ability to analyze and understand curves, and understand the source of various curves. Combining the curves to understand and establish a "dissolution-balance-transformation" thinking model, so as to provide reference cases for the problem-oriented experimental teaching of "curve integration".