Only if you talk a lot in class. If you work well in class and get your work done you have found the secret to getting good grades at school. A lot of kids take a while to figure that out. If you are picked on or bullied and don't say anything at all then the bugging will not end. So, quietly one day, be the last to leave the room of one of your favourite teachers.
Teachers have a way of getting things done without anyone ever knowing.
Teasing is different. Usually, if you ignore them, they will ignore you. Oh yea, Baby. If you pack a real lunch, you can eat in the upper gym, in some classrooms, or outside if it is nice. Apparently the Pita club meets in the upper gym and makes their own lunches on the spot.