What is your biggest problem as ELF Teacher?

Hi guys,

I was wondering, what is the biggest problem that you have in your daily activity as EFL Teachers?
I mean something that you would change, if you had the possibility.
The answer is quite open. Maybe more money? More classes? Less classes? Better colleagues? Classes with less students? Better employers? Better classrooms? etc.

None?

Than I start!
I’d like to have more freedom in teaching. Just following the course book it doesn’t help always. Some students have a different pace than other. With more freedom I could plan a lesson which fits better the whole class.