So I was talking to this teacher of mine and I was telling him about some problems I had been dealing with at home, and he put his hand on my shoulder while I was talking (to comfort me, I assume?) He left it there for a while and he started stroking my shoulder. A couple of minutes before, he had told me I looked pretty.
Personally, I don't find this creepy, but my sister does. What do you think?
Personally, I don't find this creepy, but my sister does. What do you think?

I've had a female teacher call me a "good looking lad" while physically comforting me (therapist), that doesn't mean she wanted to have sex with me.
Now your teacher may be innocent, but you should probably not get that close to him again, just in case he has ulterior motives.
In this situation, I don't think it's normal.
Maybe I should have mentioned this in my post :p
in the military they have classes on what is and isn't appropriate behavior. Green light for "nothing wrong", yellow light for "questionable", and red light for "always wrong"
a casual touch on the shoulder is in the green light category. unless the person tells you "don't"
In what way did he say that you were pretty? The way they say it often reveals their intentions.
I was complaining about a classmate of mine who had called me ugly, and he said something which in English would translate to: "You're not ugly. You're a pretty girl to look at", so I thanked him and I continued talking about my problems in class and at home and then he laid his hand on my shoulder.
I would have freaked out if he told me I was pretty
Thanks for replying btw :)
It's just that my sister thought it was weird
My pension wouldnt be worth whatever that kid could possibly make up and end up ruining my career.
He's presumably a lot older than you, and a your TEACHER.
WTF. CONTACT THE POLICE.
and he's actually less than 10 years older than me, I'm in my late teens. (and I'm no longer a minor)
And I read some of the other comments you posted and it seems you left out some details in the story, like how you were complaining that a girl said you were ugly.
But touching and stroking your shoulder may have just been a way to comfort you, I don't know.
No, that's definitely not normal. Comforting is one thing, but to linger, stroke and then compliment is weird.
Please, be careful around him and if he tries anything tell someone immediately.