This is a political and not a legal question. It's important, but litigation on this issue would be far more complex than you can imagine.
The above is general legal and business analysis. It is not "legal advice" but analysis, and different lawyers may analyse this matter differently, especially if there are additional facts not reflected in the question. I am not your attorney until retained by a written retainer agreement signed by both of us. I am only licensed in California. See also avvo.com terms and conditions item 9, incorporated as if it was reprinted here.
This is a policy issue and not necessarily a legal issue. There are many diploma options for students in high school and parents usually have a say in which diploma program their child is placed into. This is an issue to take up with the school district. You can and should also take steps to contact education policy makers.
All of Ms. Riley's responses to questions posted on AVVO are intended as general information based upon the facts stated in the question, and are provided for educational purposes of the public, not any specific individual, and her response to the question above is not legal advice and it does not create an attorney-client relationship. Ms. Riley is licensed to practice law in New York. If you would like to obtain specific legal advice about this issue, you must contact an attorney who is licensed to practice law in your state.