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教学内容北师大版四年级上册《线的认识》第16～17页。教学重点1.理解三种线之间的联系。2.会用字母正确读出直线、射线和线段。3.学会数简单图形中的线段和射线。教学难点理解直线、射线和线段的特征和区别。教学过程一、创设情境,初步了解线段师:(故意作出为难的样子)我有一件事情弄不清楚,想请大家帮忙,我假期去动物园玩,发现从老虎山到狐狸洞有许多条路。(出示课件)师:哪条路最短?生:第三条路最短。师:为什么?生:第三路是直的,所以最短。
Teaching content Beijing Normal University version of the fourth grade on the “line of understanding” 16 ~ 17 pages. Teaching Points 1. Understand the relationship between the three lines. 2. Correctly read lines, rays, and line segments with letters. 3. Learn the lines and rays in simple figures. Teaching Difficulties Understand the features and differences of lines, rays, and line segments. Teaching process First, create the situation, a preliminary understanding of the line segment division: (deliberately embarrassing look) I have a thing confused, I would like to invite you to help, I went to the zoo to play holiday and found that there are many routes from Tiger Hill to Tiger Cave. (Show courseware) Teacher: Which way is the shortest? Health: The third way is the shortest. Teacher: Why? Health: The third way is straight, so the shortest.