“老师,这朵花叫什么?”一个学生兴冲冲地跑到老师面前,举起一朵鲜红色的小花。“你拿什么来交换答案?”我微笑着问,“我刚才观察过了,这朵花有二十四个花瓣,边缘是光滑的,中间没有雄蕊和雌蕊……”她急不可待地一口气说完了一些花的特征。“好,那我告诉你,这是一朵重瓣的茶花,你可以再去研究研究为什么没有雌蕊和雄蕊?”这就是我最近跟学生的“交换”游戏——如果学生有问题来问我,她必须自己先有一些发现才能交换到我的答案,学生对于这个游戏乐此不疲。 “Teacher, what is this flower called?” A student excitedly ran to the teacher and lifted a bright red flower. “What do you exchange for the answer?” I smiled and asked. “I have just observed that this flower has twenty-four petals and the edge is smooth with no stamens and pistils in between ...” She was anxiously one Tone finished some flower features. “Well, then I tell you, this is a double petal of Camellia, can you go study and study why there are no pistils and stamens?” This is my recent exchange with the students game - if students have questions to ask me , She had to find some of her own in order to exchange my answer, students never tired of this game.