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对于“两条平行线的距离”这一概念,如果由老师直接灌输给学生,学生往往不易理解,效果不是很好。我上课时采取如下方法,收到了不错的效果。师:观察黑板上的两组平行线,看看有什么区别?生1:一宽一窄。
For the concept of “distance between two parallel lines”, if the teacher directly instills in the students, the students are often not easy to understand and the result is not very good. I took the following methods in class and received good results. Teacher: Observe the two parallel lines on the blackboard to see what is the difference? Health 1: a wide and narrow.