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1.铺垫要有度。新课的教学是在学生已有的知识基础上进行的,教师要抓住新旧知识的连接点,“铺”在关键上,“垫”在要害处,掌握好内容多少、时间长短的度,不能铺天盖地,面面俱到。 教学中,我先让学生拿出自己制作的长方体、正方体纸盒,说一说长方体和正方体的特征,接着提出两个问题:①如果一个长方体上面的面的面积是20平方厘米,那么下面的面的面积是多少?②如果一个
1. bedding to have degrees. The teaching of the new course is based on the existing knowledge of the students. The teacher should grasp the connecting point of the old and the new knowledge. The key point is that the shop should have a good grasp of the content, the length of time, Can not be overwhelming, exhaustive. In teaching, I first asked the students to come up with their own rectangular and square cartons, talk about the characteristics of cuboids and cubes, and then asked two questions: ① If the area of a cuboid is 20 square centimeters, then the following What is the area of the surface?