今天的课堂是属于学生的,不要害怕学生出错误,要引导学生从错误的想法出发,讨论探究,积极辩驳,得出正确的结论,使思维得以升华。在学习“比例尺”后,书上有一道练习题:某张图的比例尺是1厘米表示800米。一个住宅区在图上长1厘米,宽0.5厘米,它的实际面积有多少平方米?学生独立完成后,A同学订正:“比例尺是1∶80000,1×0.5×80000=40000(平方米)。”他刚说完,其他同学就抬起了头,有的皱着眉头,有的诧 Today’s class belongs to the students. Do not be afraid of the students making mistakes. They should guide the students to start with the wrong ideas, discuss and probe actively, refute them and draw the correct conclusions so that their thinking can be sublimated. After studying Scales, there is an exercise on the book: a scale of 1 cm represents 800 meters. A residential area on the map 1 cm long and 0.5 cm wide, the actual area of ​​how many square meters? Students independently completed, A classmates correct: “scale is 1: 80000, 1 × 0.5 × 80000 = 40000 (square meters ). ”" He just finished, other students looked up, some frowned, some surprised