“面积的含义”是苏教版三年级下册的内容,是学生首次正式学习面积的概念。由于度量面积时需要借用单位长度来构造单位面积,所以,从度量一维的长度到度量二维的面积,是学生认识过程中的一次飞跃。而建立正确、清晰的面积表象,对后续学习各种平面图形的面积计算起着至关重要的作用。本节课教材安排了2道例题。例1分三个层次帮助学生理解面积的含义。第 “Area of ​​meaning ” is the content of the third grade of the Sujiao version of the book, is the first time students formally learn the concept of area. Since the unit area needs to be borrowed to measure unit area, it is a leap in the process of recognizing students from measuring the length of one dimension to measuring the area of ​​two dimensions. The establishment of a correct and clear image of the area plays an important role in the subsequent calculation of the area of ​​various graphic images. This lesson material arranged two examples. Example 1 in three levels to help students understand the meaning of area. No.