Do you enjoy what you do? Do you feel like you are making a positive impact on the students' lives? If you still love teaching students and still love teaching band and music, maybe this school just isn't the right fit for you? Being asked to resign could be for a myriad of reasons, both legitimate and illegitimate.

If you had not been asked to resign, would you still want to be in the profession? I think the answer to that question is the same answer to whether you should stay in the field or not.