“比例”概念教学的成败,直接影响正、反比例两个小节的教学。课堂上,注意引导学生发现比例中两个比的比值相等,强调比例是由两个比所组成的等式,对于教好“比例的意义”有十分重要的作用。一、由生活趣事导入新课课一开始,教师便说:“我们已经学过了比(板书‘比’字)。你们知道我们人体上许多有趣的比吗?例如,将拳头翻滚一周,它的长度与脚的长度大约是 The success or failure of the concept of “proportional” teaching has a direct impact on the teaching of two sections, positive and negative. In class, it is important to guide students to find out that the ratio of the two ratios in the ratio is equal, emphasizing that the ratio is composed of two ratios and plays an important role in teaching the meaning of proportion. First, the introduction of the new class lesson from the fun of life At the beginning, the teacher said: "We have learned more than (the book '比' word). Do you know our body many interesting ratio? For example, the fist rolling a week, it The length is about the length of the foot