苏教版《教师用书》以其先进的理念和对小学数学教学的深刻理解,为小学数学教师的教学研究和教学实践发挥了指导作用。我在实际教学过程中发现该书有两处值得讨论的地方,现分析如下。1.圆面积公式的铺垫有“强权”之嫌。以圆的两条互相垂直的半径为边,画一个正方形,把正方形平均分成若干个小方格。用数方格的方法,先数出正方形的面积,再数出圆的面积,最后用圆的面 With the advanced concepts and profound understanding of primary school mathematics teaching, the version of “Teacher’s Book” of the Soviet version of “Teacher’s Book” has played a guiding role in teaching research and teaching practice of primary school mathematics teachers. I found in the actual teaching process the book has two places worth discussing, are analyzed as follows. 1 round area formula bedding “power” suspicion. Draw a square with the two mutually perpendicular radii of the circle, dividing the square evenly into small squares. With the number of squares method, first out the square area, and then count out the area of ​​the circle, and finally with a round surface