一、怎样教学生认识量角器? 学生要学会量角,必须首先熟悉量角器。据此,教学时可分成以下三步进行:1.运用直观。教师出示量角器的教具,指导学生观察其形状及把半圆平均分成多少份。2.为了讲清“每一角所对的角,叫做一度的角”,可用教具演示(教师可把木制 First, how to teach students know protractor? Students should learn to measure angle, protractor must first be familiar with. Accordingly, teaching can be divided into the following three steps: 1. Intuitive use. Teachers produce protractor teaching aids to guide students to observe the shape and the average number of divided into a semicircle. 2. In order to clarify “the angle of each corner, called the angle once”, available teaching aids (teachers can put wooden