新课改实施以来,我们惊喜地发现:课堂气氛活跃了,学生活泼了,胆子大了,敢于提问,敢于发表自己的意见和看法。但是,也常常看到这样一些镜头:很多同学高举小手不停地大喊,根本不管正在发言的同学,也听不进同学说什么;一听要动手实验,学生就迫不及待地动起手来, Since the implementation of the new curriculum reform, we were pleasantly surprised to find that: the class atmosphere was active, the students were lively, courageous, dared to ask questions, and dared to express their opinions and opinions. However, we often see the following shots: Many students hold high their hands and shout, regardless of whether they are speaking to their classmates or not listening to what they say. When they want to experiment, students can not wait to move their hands.