“角的初步认识”是人教版二年级上册的内容,它是在学生已经初步认识长方形、正方形、三角形、圆形的基础上教学的。2011年课程标准的拟定中把角的认识分成两个阶段进行教学,其中第一学段在教材中只是把建立角的概念放在“初步认识”的水平上,这就要求教师在教学时,既要巧妙地避开角的概念,又要揭示角的本质属性,为中高年级继续学习角和其他几何图形奠定基础。下面结合“角的初步认识”教学实践谈谈在低年级教学中基于教材、又适 “Corner of the initial understanding ” is the second edition of the PEP content, it is based on the initial understanding of the students rectangular, square, triangle, round based on teaching. In 2011, the standard of curriculum was divided into two phases to make the cognition of teaching angle. The first one of the teaching materials just put the concept of establishing angle on the level of “preliminary cognition”, which requires teachers to teach , We must not only cleverly avoid the concept of angle, but also reveal the essential nature of angle, and lay the foundation for further study of angles and other geometric shapes in middle and upper grades. The following combination of “corner of the initial understanding ” teaching practice to talk about in the lower grades of teaching based on textbooks, but also