“认识负数”是苏教版第9册的教学内容,它是在认识了整数、分数、小数的基础上进行教学的。执教这一节课,我确定的教学目标有三个:一是让学生体会负数产生的必要性。因为之前(一至四年级)学过的数都不能清楚地区分一对意义相反的量,而用负数却能简洁明了解决新问题;二是让学生结合实际情境理解负 “Negative Recognition ” is the teaching content of Book 9 of the Sujiao Version, which is based on the knowledge of integers, fractions and decimals. Coaching this lesson, I identified the teaching objectives are three: First, let students understand the necessity of negative. Because before the (first to fourth grade) learned number can not clearly distinguish between a pair of opposite meaning, but with negative numbers can be concise solution to new problems; the second is to allow students to understand the actual situation negative