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建模点1:“厘米”模型所属内容:第2页-第4页的例1、例2、例3及相应“做一做”教材简析:例1呈现古代人们用身体的一部分的长度作为测量长度的“单位”测量某一物体的长度的图片,让学生初步体会到测量长度必须要有标准——长度单位。通过学生和老师同样用拃量同样长度的课桌,所得的测量结果却不一样的活动,使学生体会到:虽然都用“拃”来量,但由于不同人一拃的长度不同,所得到的结果不同,进而使学
Model 1: “cm ” Model content: Page 2 - Example 4 on page 4, Example 2, Example 3 and the corresponding “do one” textbook analysis: Example 1 presents the ancient people with the body As part of the measurement length “unit ” to measure the length of an object picture, allowing students to initially understand the measurement length must have a standard - length unit. Students and teachers also use the same amount of measuring the same length of the desks, the resulting measurement results are not the same activities, to enable students to understand: Although all with “拃 ” to the amount, but due to the different lengths of different people, The results obtained are different, thus making learning