一、教学内容:六年制数学课本第十二册58页例1。二、教学目标1.理解比例的意义。2.判断两个比能不能组成比例。3.会用a:b=c:d或者a/b=c/d两种形式表示比例。4.知道比例各部分的名称。5.渗透事物是联系的辨证唯物主义观点。三、实现教学目标的建议“比例的意义”是在学生已经掌握了“比的意义”和“求比值”的基础上进行学习的。是进一步学习正、反比例的基础。根据课时教学目标教学过程可 First, the teaching content: six-year mathematics textbook twelfth book 58 page Example 1. Second, the teaching objectives 1 understand the meaning of proportion. 2. To determine whether the two ratio can be composed of proportions. 3 will be a: b = c: d or a / b = c / d two forms that ratio. Know the name of each part of the ratio. 5. Infiltration of things is the dialectical materialist point of contact. Third, to achieve the teaching objectives of the proposal “The significance of the ratio” is in the students have mastered the “ratio of meaning” and “seeking value” based on the study. It is the basis for further studying positive and inverse proportion. According to the teaching objectives of the teaching process can be