I have been told I've been very good as using the "evil Eye". it does work great as a form of discipline

@elizabeth617 it is tough because they are adults and many have children so they need their phones. Of course it is usually the ones that don't have the kids that are on their phones. My policy is set in the beginning of a course about not having them be a distraction to me, themselves or others. If they need to use the phone or have an emergency, they can leave the room. That way they still have their phones in case they need them.

If students are using them in class, I wll walk over to them and quietly ask… >>>