“认识角”是苏教版《数学》二年级下册第七单元的内容。角是一种最基本的几何图形,认识角是进一步认识其他几何图形的基础。结合生活中常见的物体认识角,有助于学生从自己的生活经验出发自主构建角的概念,同时也有助于学生进一步体会认识平面图形的一般方法。而我在打磨这次课 “Knowing the angle” is the content of the seventh unit of the second grade of the Second Edition of Mathematics of the Sujiao edition. Angle is a kind of the most basic geometry, the angle of knowing is the basis for further understanding of other geometries. Combining the common knowledge of objects in life can help students to construct the concept of self-building corners from their own life experiences, and also help students to further understand the general methods of recognizing graphic figures. And I’m grinding this lesson