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《义务教育数学课程标准(2011年版)》指出:教师要发挥主导作用,引导学生独立思考、主动探索、合作交流,体会和运用数学思想和方法,让学生获得基本的数学活动经验。那么,教师该如何让学生在探究经历中积累数学活动经验呢?下面笔者以“圆的面积”为例,谈一下自己的思考和尝试。本课教学之前,学生学的都是多边形的面积,要计算圆这样的曲边图形的面积,这是第一次碰到。让学生完全自主探索如何把圆转化成长方形有
The Standard of Compulsory Education Curriculum Standard (2011 Edition) states: Teachers should play a leading role in guiding students to think independently, take the initiative to explore, cooperate and exchange ideas, understand and apply mathematical ideas and methods to enable students to acquire basic mathematical experience. So, how to let the students accumulate experience in mathematical activities in the exploration experience? The author below to “circle area ” as an example, talk about their own thinking and trying. Before the teaching of this lesson, students learned the area of the polygons. For the first time, to calculate the area of a circle with such a curve. Let students fully explore how to turn the circle into a rectangle