There must be something that can be done, no? speak to the principal, the counselor, the teacher of her lowest ranked class, ask for special assignments, or a way to bump an old grade, or do community service in exchange, or have life credit bumps or whatever it takes. I would argue like the worlds best lawyer till someone heard me. If one door got locked in my face, I would shift to the next door. Call the school board! Speak to the town selectmen! Call the School administrator! There must be ONE credit worth of something laying around somewhere, yes?

Im sorry this is happening to you.