Please don't be late again. It disrupts other people's lessons.

You look a bit tired. Are you getting enough sleep?

I want you in groups of three. A, B, C, A, B, C ...

The preposition you need is about.

We've all worked really hard this week. Let's go out for coffee and just talk in English.

Aha! I thought you knew that. Let's do a little more work on it tomorrow.

No, that's not the right verb, John.

planner

disciplinarian

manager

counsellor

knower

diagnostician

relationship builder

assessor