If I were you I would have changed class, what was a relief for me when I got bullied was that we got a change in classes, so instead of having 10 - 12 year old, we got 10, 11, 12, 13 years only-classes. =)

You shouldn't beat them up, if it ain't selfdefence!

I'm sorry if it's bad help but if I were you I would have changed class. =)