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【案例】在学生认识平行线概念后,教师按照教材编排(如图)教学“自由画平行线”和“规范画平行线”两个环节的内容。师:我们已经认识了平行线,也在生活中找了平行线,那你能动手创造平行线吗?出示长方形纸,提问:你能想办法折出几组平行线吗?(学生操作)这些折痕除了互相平行外,还会有什么关系呢?试着动手量量每条折痕的长,说说你有什么发现。用其他不同形状的纸片,你是不是也能折出平行线
[Case] After the students understand the concept of parallel lines, the teacher should follow the teaching material arrangement (pictured) to teach the content of “Freehand Parallel Lines” and “Normal Parallel Lines”. Teacher: Now that we’ve got to know parallel lines, we’ve also found parallel lines in our lives. Can you create parallel lines? Show rectangular paper and ask: Can you think of ways to fold a few parallel lines? In addition to the creases parallel to each other, what is the relationship? Try to measure the length of each crease, talk about what you find. With other different shapes of paper, you can also be folded parallel lines