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在苏教版三年级下册“图形的平移与旋转”一课中,对于例题中小房图向右移动了几格这个教学难点(如图),一直找不到突破的途径。但我校一位青年名师的课,给了我很大启发,让我一下子豁然开朗。小房图向右平移了()格出示例题,让学生独立思考,然后暴露学生的思维,一般有以下三种可能,有的学生说:向右平移了4格(因为两个小房图中间间隔4格);有的学生说:平移了7格(因为对应的线或点之间相隔7格);也有的学生说:平移了10格(因为图形的最左边与最右边之间
In the third edition of the Sujiao version “lesson translation and rotation ” lesson, for the example of the small room diagram to the right several grams of this teaching difficult (pictured), has been unable to find a way to break through. But my class a young teacher, gave me great inspiration, let me suddenly. Small map to the right shift () grid sample examples, allowing students to think independently, and then expose the students’ thinking, there are three possibilities, some students said: the right shift of 4 grid (because the two small room in the middle Some students said: Pan 7 grid (because the corresponding line or point separated by 7 grid); Some students said: Pan 10 grid (because the graph between the left and right