A new teacher asked me, "How can I deal with a student who chronically misbehaves? He interferes with the learning of other students."
There are three suggestions I gave her. First, redirect the other students' attentions from this student. I immediately put my students into a pair-share so I could deal with the individual student. Next, try to find the root of the problem. The misbehavior is caused by something--is it a need for attention? Is it a way to cover-up a lack of success in the classroom? Until we deal with the cause, the misbehavior will continue. Finally, find a strategy that will stop the behavior. That may mean moving the student to an isolated spot near your desk, using a positive behavior intervention plan (positive is always better than negative), or asking for help from an administrator. Ultimately, misbehavior is a symptom. Do your best to understand what is going on, then take appropriate steps from there.