I donot know that the era changs men,or men chang the era.I watched a movie which was  named " to return to the 20 of  age." last night.There is a episode i remember that  show a teacher who is a protagonist how to teach the undergratuate.it showed when the teacher asked studentt some questions,some students were sleeping,the another students were playing the phone,and some one was talking or taping.I thought an university is a selomn,romatic place.It  foster many elites ,intelligents,and teach the students how to learn being a human being,make a relationship in the society.AS a sutdent ,we have to respect  teachers,and abide by  discipline.However, as same as the movie,the class of univertity looks like a supermarket.The student do what they want to do .Even though teacher angried,students only quiet for a while.Then, continue to do they want to do.If teacher speach wrong something,student follow him or her and laughing at him.I think it is teacher's sad.He cannot control the class,and lazy to control it.As a  responsible teacher,we should lead the class and try to make your student respecting you. I think it is wrong to reveal and shoot the episode on the movie.Although it is true in a way,many students will be effect on their behavor and iminated these action.  We totally can describe a good class in the university instead of the bad class.