“长方形的面积”一课是在学生认识了常见面积单位,并初步掌握用摆方块测量面积的方法后展开的教学,要求学生经历探索长方形和正方形面积公式的过程,在实践操作、讨论交流等活动中,积累活动经验,初步养成独立思考、勇于探索的习惯。教学中,如何在学生已经会“铺方块”的认知结构上,通过不同层次的操作活动,展开“有意义”的学习,同化、顺应新知?我进行了如下尝试。案例描述:出示第一个图形(面积8cm~2),请同学们用老师之 “Rectangular Area ” Lesson After the students have come to know common area units and initially mastered the method of measuring the area with pendants, the students are required to go through the process of exploring rectangular and square area formulas in practical operation and discussion Exchange and other activities, the accumulation of experience in activities, the initial development of independent thinking, the courage to explore the habit. In teaching, how to carry out “meaningful” learning, assimilation, and new knowledge through different levels of operating activities in the cognitive structure that students already know “square”? I made the following attempt. Case Description: Show the first graphic (area 8cm ~ 2), please use the teacher’s classmates