You have got some good info here. Avoid a fight when possible, but fight like a mad man when you have to.
Attitude is the one thing that will help you avoid fights. If you carry yourself tall and strong, people will think twice before messing with you. I was a LEO for 15 years and can tell you, the way you carry yourself and the way you look at people makes a big difference. I have a look that has backed off many men far larger than me and had them begging not to kick their butts. It works. If you have the reputation around school as being an easy target, it may take giving someone else a good butt kicking in front of others to change your reputation. After the fight, looking at everyone else with a crazed look in your eye and asking who is next will back the rest off. Once word gets around, the bullys will look elsewhere for an easier target. I'm not saying to go pick a fight, only that if you get in one, go full tilt crazy. Try not to injure too bad or you could end up in trouble with the law. Self defense is a proper excuse for a fight, starting one first may not be.
My best to you, John k
Anyone worth shooting is worth shooting more than once!
Stop crime, shoot back!
EARTH FIRST! We'll hunt the rest of the planets later