Your MAP reading score places you at the 98th percentile for reading in your grade overall, including all the non-advanced students in the norming sample; the next highest score in your advanced class was at the 86th percentile. I wouldn't be concerned just over those types of scores, no-- your score is not so "out there" that you'd definitely be unable to be accommodated in a regular classroom, and the next highest scoring student is probably a good reader as well.
In addition, reading is certainly an important learning-enabling skill in a school setting, but high reading ability doesn't mean you can't be challenged by the material in your classes. It just means that you'll have an easier time comprehending written material about each subject.
That doesn't mean you don't deserve more than you're slated to get this year. What's the basis of your feeling that you're more intelligent than your classmates? Is it in-class performance? There might be some of your classmates who are bright too, but don't volunteer answers as often. But do you very often know material before it's taught? Do you get perfect scores without effort or needing to study outside of class? If your answers to these sorts of questions are affirmative, is there some way to ask for more advanced placement this year?
