Do you think that teachers should set up a good relationship

Yes,I do.
Because teaching is the job of the teacher,teacher need to communicate
with students when he is doing his job.It is necessary for the work.
In addition,a good relationship between teachers and students can make
the education better,it is helpful to both.
Last,we should set up a good relationship with others,it will make you feel good and live a happy life.The students also should set up a good relationship with the teachers !

Should, teacher not do well the relations with the student, how to educate

first, it can help the teachers teach the students well.
second, it can help the teachers know more things about the students then if the students have something wrong the teachers can solve them easily.
third it can let the students love the knowlege or the class then they can get the high sores.