Can a teacher "disrespect" a student?

Talk to your counselor or Principal about this. Your teacher was being disrespectful even more when she humiliated you in front of the other teachers and was making a joke out of it. I have lots of incident in school and I gotta say it takes more guts to walk away then it does to start something. You did do the right thing and I believe if you do go to someone about this that you will not get in trouble nice job blowing it off it was hard, but in the long run it paid off.