The school has a right to deem what is a distraction to the rest of the student body; however, she may have a first amendment case. It will be interesting to see how this all pans out.
The 'little ***** needs to learn her place' you say? Nothing says rugged individualist like conformity and doing what you are told. Oh, and if you truly find this shirt offensive I would advise to stop being such an overly-dramatic *****.
There in no case MDK, SCOTUS has ruled on this repeatedly, students , and indeed teachers, do NOT enjoy their full first amendment rights while on school campus.