初中学生是从初二开始学习物理的，如果在起始阶段对单位问题及字母符号问题不够 重 视，经过一段时间的学习，将会有相当数量的学生掉队。事实证明，重视单位的教学，对 学生的学习会收到事半功倍的效果。下面谈谈具体做法。 　　一、从兴趣入手，使学生获得有关单位的形象而 Junior high school students study physics from the first two days. If the problem of the unit and the letter symbol is not sufficiently regarded in the initial stage, after a period of study, a considerable number of students will be left behind. Facts have proved that paying attention to the teaching of the unit will have a multiplier effect on student learning. Let’s talk about specific practices. First, start with interest, so that students can obtain the image of the relevant unit.