一、明确角色分工,确立课堂规则(一)角色分工1.小沙漏师:每一组第一个是桌长。桌长的对面,就是前面的右边这个人是什么?(白板出示:小沙漏。生齐答:小沙漏。)师:好,请问沙漏和闹钟有什么区别?两个都可以计时啊!最大的差别是——谁没有声音?生:(齐答)小沙漏。师:所以待会儿你在组内负责计时,可以有 First, a clear role division of labor, the establishment of classroom rules (A) the role of division 1 small hourglass: the first of each group is the table. What is the person on the right in front of you? (Whiteboard shows: Small Hourglass.) Students: Well, what’s the difference between the hourglass and the alarm clock? Both can be timed! The difference is - who did not sound? Students: (Qi answer) small hourglass. Teacher: So you will be responsible for timing in the group later, you can have it