I agree that sometimes ignoring works wonders, but sometimes it doesn't. Go ahead and give it a try--ignoring them might take the "fun" out of it and you can easily lose them in the crowd of a bigger school. But, in case they're ruining your life (again...) a couple of other ideas:

~~be honest with your mom or dad about what's going on at school. I didn't tell my parents for three years and it was three years of it before I got out--very stupid. Be smart--be honest.

~~tell someone in administration (like a school counselor, vice-principal, or someone in the office). teachers (especially in Jr. High or High school) really can't be that helpful. What are they going to do? tell them to stop for the 48 minutes your actually in their class and just make the kids reek havoc afterwards? But tell a counselor and not only can they help you through it, but they can hit those kids where it really hurts--by telling their parents.

~~find two or three "soul mates"--people who you click with so well that they will stand up for you and stick by you--from day one. So Loser Boy (a.k.a. Bob) says you're stupid and ugly--you need someone to tell him that, not only are you smart and gorgeous, but he's too much of a moron to know the difference. And you do the same for them. When someone bashes you, you're too busy being brave to think of a good comeback--but someone just a few feet away has all the gusto that you can't find right then. And don't be afraid to tell someone when you meet them--"There's this idiot who's mom didn't teach him how to be nice--could you stick with me when he shows up and starts being stupid?"

Good Luck and let me know how it all goes--