一、创设情境,激趣导入1.课前热身。师:同学们,你们会玩“石头、剪子、布”的游戏吗?老师想请一位学生和老师来做这个游戏,再请一位记分员在黑板上用画“正”字的方法记分,谁赢一次就在谁后面画上一笔。(教师和一位学生比赛,另一名学生记分,其余学生齐喊“石头、剪子、布”。)2 First, the creation of the situation, interest import 1. warm-up before class. Teacher: Classmates, would you play the game “Stones, Scissors, Cloths”? Teacher would like to invite a student and teacher to do this game. Then a scorer will draw a score on the blackboard with the word “正” , Who won a draw on who behind. (The teacher and one student race, another student scored, and the rest of the students shouted “Stone, Scissors, Cloth.”) 2