In the multi-media teaching environment, the whole teaching process can be recorded by the form of multi-media courseware, at the same time, the classroom situation and the teacher's teaching process can be recorded and saved, this is for the students who can't digest what they have learned in class to review and consolidate it at home, but it also encourages the students to rely on it. Students often have "do not listen to the class is fine, go home to read it again, " "this paragraph did not understand, never mind, after not understand, go home to read it again. "