Absolutely. Professors are expected to uphold academic integrity and not plagiarize materials.

There's no guarantee they'll believe you, but it's better than doing nothing.

Document everything and start building a case. He's a piece of shit.

I hate to be the downer, but this is how academia works. Ph.D students get their work stolen/have credit taken all the time, which took so much more planning than a thesis. I'm not saying it's right or that it doesn't totally suck, but I really doubt anyone is going to do anything. Sorry OP, it's a shitty world out there.

That professor was no Einstein, so he had to plagiarize.

Talk about intellectual theft.

Hopefully OP emailed it to the professor, this way OP has proof

She asked a teacher to look over their work, and the teacher liked it so much that he stole the credit for doing it.

Incorrect, 7. She told him the general subject she was going to write the thesis on. Theses are incredibly important for passing courses in college-level settings, and subjects are quite hard to find that you'd be willing to invest time in and be able to succeed in. Basically the professor stole a very long time of planning.

No, OP told his/her professor what topic he/she was going to use for their thesis paper. The professor liked it so much that he decided to write his own paper on the topic.

Professors have to write their own papers? o_o

If they're doing a Masters as well as teaching, yeah. Relatively common

How did they get the teaching position without the degree?

You can teach with a bachelor as long as you are working for your master.

#74 There's an S/M joke in there somewhere...

That is exactly what he is doing

yeah, basically listened to all op's thoughts viewpoints and ideas on the subject and decided they were going use them for themself on a paper of their own.

Part of being a [research] professor is continuing to do research and publishing case studies, proposing theories, etc.