but that is not nogeia really to the discussion at hand of how to help this worthy Bas Yisroel with a serious problem.
IMHO, this girl with so much Kedusha in her should be homeschooled, so that she can work on her own path to Hashem (as she seems capable of doing) and maybe even just Daven all day. Being in school just holds her back and opens her up to influences from schoolmates, as well as teachers that will insist on their own derech (as we see happening).