Bullying is a VERY big deal these days. Here are some resources:

http://www.bullypolice.org/
http://www.stopbullying.gov/get-help-now/index.html

You did a great job, keeping calm. Be the better person.

I can't believe you had a teacher do nothing. Sorry you had to go thru that. That was way wrong and could very likely get him/her fired. Tell your teacher again and if nothing is done go over her head to school officials.Use get-help-now above. there's lots of good stuff.

Good luck!