If the class size allows me, spread the students out more to try to prevent cheating. I already have the students remove all their bags away from them and at a designated area.
When it comes to having a problem student in the classroom, I have had that a couple of times. I try to keep them in the classroom and see why they are acting the way that they are. If they continue to distributive, then I have removed them from my class and have written them up.
