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在我县举行的联谊学校同课异构的教研活动中,两位老师对北师版《数学》六年级下册《比例尺》这节内容作了精心设计。他们的教学都是从“画线段”引入,由于教学处理方法的不同,却收到异样的效果,形成了鲜明的对比。特别是比例尺概念的建构过程,给我留下深刻的印象。一、案例一1.教学片断。师:同学们喜欢画画吗?请你分别画一条5cm、10cm的线段和100米的线段。
In our school’s heterogeneous teaching and research activities in the same school, the two teachers elaborately designed the content of the section “Scale” of the sixth grade “Mathematics” of the North China Normal University. Their teaching was introduced from “drawing lines ”, because of the different teaching methods, but received a strange effect, in sharp contrast. I was especially impressed with the construction of the concept of scale. First, a case of a teaching piece. Teacher: Do students like to draw pictures? Please draw a 5cm, 10cm line and 100m line respectively.