Teachers are some of my favourite people to type, because listening to how they talk and express themselves is usually a bit more interesting than the subject their teaching, so it's a good distraction. Anyways...
My math teacher is a pretty standard LII (I think he's lame, I've had way better Alpha NT teachers in highschool; just a sidenote, I think creative Ti people teach the absolute best, no real contest, they're entertaining and are usually against bullshit teaching, clear and concise and interesting)
He's very much like an Alpha NT with how objective he is and how he's very indifferent to the class and doesn't hold them to any standards. He's basically just "I'll tell you the consequences of your actions, but I won't say anything more than that", so not forceful in the least. I don't know what other type has such a strong theme of strictly objective logical statements as a way to help people be informed but without any pressure or emotional manipulation:
"If you do this, there's a 100% chance that I'll do this, but if you do that, then there's a 0% chance I'll do this"
"I've counted every movie (138) I've watched from the beginning of 2016, and ranked them all from favourite to least favourite."
"In ideal world..... but in a practical world"
"I don't even care if you... but if you do it, just make sure I don't have to see it."