“角”的知识,对低年级小学生来说是一个很抽象的数学概念,如何让学生理解,并能掌握它的数学内涵,对教师是一个挑战。最近听的一节有关“认识角”的课中,发现一个现象值得思考。【教学片断】教师出示一些角的图片,带领学生认识了一些“角”。师:同学们,想不想动手做一个“角”?生:想。(学生很快拿出工具动手做了起来)师:把你的活动角变大,再变小。 The knowledge of “angle” is a very abstract mathematical concept for the lower primary school pupils. How to make students understand it and master its mathematical connotations is a challenge to teachers. Recently heard about a section on “understanding angle ”, found a phenomenon worth considering. [Piece of teaching] teachers to produce some corner of the picture, leading students to recognize some “corner ”. Teacher: Students, do you want to do a “angle ” Health: think. (Students quickly come up with tools to do it) Teacher: the corner of your activities larger, then smaller.