How the teacher should behave when the students doing bad behavior in the class?

Feedback is should be given during the classroom activities. A teacher gives feedback when students do something that should be corrected, such us if students spell something wrong in English, so the teacher asked something ei or ai. And the students think and repeat what should be spell correctly. It is appropriate I think to correct it to give feedback about the material, so the students can understand how to spell it.

But, when student do wrong thing in their behavior during the process of classroom activity, the teacher should talk directly to that student that the behavior is not appropriate.

Teacher should not talk or give advice to the whole class that the children wrong in behavior; you should do this and not do this. That kind of thing will make the student feel hurt both mental and physical. Teacher should not rebuke the student bad character in front of the class, because that kind can open a disgrace of the student. As we remember my last post of Harun ar-rosyyid.

So, the teacher can talk face to face to the teacher that have bad behavior privately, in teacher room maybe, and talk that the kind of behavior is not good. Talk with affection to the student that as a teacher, we want that student have good character.