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前不久,听了一位老师的一堂概念教学课。这位老师在使学生正确认识概念,真正理解并掌握概念上确有特色,现简单介绍如下,并谈谈本人的一点体会。这堂课的目的是要求学生证确理解互相垂直、垂线、垂足这三个概念。这当中,相互垂直是个难点。下面我们就来看这位老师是怎样突破这个难点的。课一开始,老师先在黑板上出现一组图形(如下图):让学生充分观察,同时提出问题。这些图形有哪些相同的地方。学生通过观察、讨论,发现:①都是两条直线;②都能相交。于是老师板书:“两条直线相交。”在这基础上,老师又提出问题,请大家观察一下,你认为这些图形中哪些图形可以并在一起,为什么?学生们
Not long ago, after listening to a teacher's concept teaching class. The teacher is to enable students to correctly understand the concept of truly understand and grasp the concept of the concept of a really unique, are briefly introduced below, and talk about my experience. The purpose of this lesson is to require students to confirm the correct understanding of each other vertical, vertical, foot drop these three concepts. Among them, the mutual vertical is a difficult point. Here we look at how the teacher broke through this difficult point. The beginning of the class, the teacher first appeared on the blackboard a set of graphics (as shown below): allow students to fully observe, at the same time raise questions. What are the same in these graphics. Students through observation, discussion, found: ① are two straight lines; ② can intersect. So the teacher's writing on the blackboard: “The two lines intersect.” On this basis, the teacher asked questions again. Do you want to look at what patterns do you think these figures can hold together? Why?