不知从何时开始,课堂的主人成了学生;不知从何时开始,同学们可以开始自己讲课;也不知从何时开始,在这里,我们自己探究知识……那是一个阳光明媚的春日,在教室里,一场公开课正在如火如荼地进行着。那节课上,我们小组负责讲解生字与词语。当我正在讲解“人声鼎沸”这个成语的意思时,我看见有个同学面露疑惑的神情,显然是没有听懂。我刚准备向他提问的时候,他已经站了起来,并问我:“为什么‘人声鼎沸’不是用于形容声音大呢?” I do not know when the class master became a student; I do not know when the class was started, my classmates could start lecturing myself, and I do not know when it started, where we explored our own knowledge ... It was a sunny spring day, In the classroom, an open class is in full swing. In that class, our group was responsible for explaining words and words. When I was explaining the meaning of the idiom “voiced sound ”, I saw a classmate looked confused expression apparently did not understand. When I was going to ask him questions, he had already stood up and asked me: “Why is it so loud?”