MANY WAYS. Some feel tricks exist. One is simple--learn self-defense. Another is make sure you are not projecting an image of weakness, worry or sadness--some grades have routine bullying. Do discuss with parent. Involving school can be of use if they are big prevention locations. In florida prevention is poor. This will end. Make sure an depression is treated. Learn verbal sparring and making jokes=power.
Tell someone. Find someone you trust and say something. Keeping it inside does nothing. Depending on the context, find out what resources you have at your disposal to stop the bullying.