If a wrong occurs in the classroom, should the reproof be done in front of the students?

The questioner : Sometimes a wrong is committed by the teacher or the student... If he leaves, do we reprove him?

The Shaykh : It is proper conduct that if the teacher makes a mistake, you do not correct him in front of the students. But if he leaves, point out the mistake to him. If he returns to the truth, that is what is required. If he does not return, then in the next lesson, the mistake must be clarified.