At my school there is a student that all the instructors find to be 'difficult'. He thinks he knows everything and is constantly challenging his instructors, which often disrupts the class.
At first I found this student to be difficult myself, until I noticed that whenever I agreed that he was right about something he didn't interrupt again for about half an hour.
This gave me an idea, and from then on I tried to ask him questions periodically that he would be likely to get right, and this has kept him engaged in the class and no longer disrupting… >>>