Ok - get it off your chest. Here's your chance to moan about your students' annoying habits.
I'll start you off with those who just can't keep up when you're checking homework. You and the rest of the class are on number 6 and then he \ she pipes up with "Hang on. What was number 2 again?" And why is he \ she behind in the first place? Because he \ she hadn't even done the homework in the first place and is writing in the answers as you're checking them!
You can't see the board for the steam coming out of my ears, I can tell you.
So, what do your lot do?