【教学内容】人教版二年级上册第38~39页。【教学过程】一、导入1.同学们,今天老师带来了许多美丽的图片,请看大屏幕(出示著名建筑),漂亮吗?这些美丽的图片上有角吗?谁来找一找。(学生指,媒体出示)指的时候让学生把整个角指出来。【设计意图:通过学生熟悉的生活中的建筑唤起对已学图形的回忆,并引出新知,初步感知角。】二、新课1.它们上面都有角,现在老师给这些角脱去它们美丽的外衣,就变成了这个样子(媒体出 Teaching content】 【PEP two years on the first 38 ~ 39 pages. 【Teaching Process】 I. Introduction 1. Classmates, today the teacher brought many beautiful pictures, look at the big screen (to show famous architecture), beautiful? Are these beautiful pictures with horns? Who will look for a look. (Student refers to the media to show) refers to the time for students to point out the whole corner. [Design intent: arouse memories of learned graphics through the familiar buildings of students, and lead to new knowledge, initial perception angle. Second, the new lesson 1. They have a corner above, and now the teacher to these corners off their beautiful coat, it becomes like this (the media out