下面是二年级《认识厘米》教学片段。师:小朋友,今天的数学课我们先来认识一个字。(板书:拃)认识这个字吗?(学生摇摇头。教师加注拼音:zhǎ。学生拼读。)师:知道它的意思吗?(学生再次摇摇头。稍过一会儿,有一位学生举手。)生:它的意思就是眼睛一眨一眨的。师:眼睛眨,它的偏旁应与“目”有关;而这个“拃”的偏旁是——提手旁。小朋友们猜一猜,这个“拃”的意思大概与什么有关?生:手!师:(出示“一拃”图)对!大家看图,大拇 Here is the second grade “centimeter” teaching fragment. Teacher: Children, today’s math class we first come to know a word. (Board: 拃) Know the word? (Students shook their heads.) Teachers raise Pinyin: zhǎ. Students spelling.) Teacher: Do you know what it means? (Students shook his head again.) A moment later, ) Health: It means the eyes blink. Teacher: The eye blinks, its radical should be related to the “head”; and this “拃 ” radical is - handle next. Guess what the meaning of this “拃 ” about what? Health: Hand! Teacher: (Show “A 拃 ” Figure)