一、由一棵桂花树缘起(一)情境导入教师赞赏中山路小学校园的绿色风景,同时提出,有一个现象让他感到困惑,并向学生展示摄像短片:道路两旁的桂花树中,有一棵早已干枯(死亡),而这棵桂花树又是与其他桂花树在同一时间种植的。(二)提出问题在观看短片的过程中,学生都非常关注那棵枯 I. Introduction from a sweet-scented osmanthus tree (1) Situational introduction Teachers appreciate the green landscape of the Zhongshan Road Primary School campus. At the same time, it is suggested that there is a phenomenon that puzzles him and shows the students a video clip: Among the osmanthus trees on both sides of the road, there is a tree Already dead (dead), and this osmanthus tree is planted with other osmanthus trees at the same time. (B) raise questions In the process of watching the video, students are very concerned about that withered