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“正比例的意义”一课的教学重点是让学生领会成正比例关系的两种量的特征,并能够把握两种量之间的关系,但学生对此往往停留在形式的模仿上。如何实现从形式模仿到意义建构的转化呢?课堂教学中,我从对比入手引导学生经历概念的思维建构过程,获得了良好的教学效果,现将自己的教学和思考分享如下。一、对比分类,建立基本的数量关系教学片断:师:路程是一个数量,由路程你想到相关的什么量?生1:速度和时间。师:对比一下时间和速度,想一想,这几个量之间有什么关系?
The teaching of “Proportional Meaning” is mainly about teaching students to understand the two kinds of characteristics that are directly proportional to each other and to grasp the relationship between the two kinds of quantities. However, students tend to stay in formal imitation for it. How to achieve the transformation from formal imitation to meaning construction? In classroom teaching, I start from the contrast to guide students through the process of thinking of the concept of construction process, access to a good teaching effect, now their own teaching and thinking are as follows. First, the comparative classification, the establishment of a basic quantitative relationship Teaching piece: Teacher: the distance is a number, by the distance you think about the relevant amount? Health 1: speed and time. Teacher: Compare the time and speed, think about it, what is the relationship between these quantities?