Make a pros and cons list. Show your parents why you want to change schools, and what you would benefit from changing schools. Show them that you are serious about your decision. My parents weren't too keen on the idea of letting me switch schools until I showed them that I was serious. You can also try and schedule a meeting with the principal, of v.p., superintendent, e.t.c. to help your parents make a decision. My advice may not work since we have different parents. But it's worth a shot, right? I hope you find what you're looking for.