[quote=@Lucius Cypher]
Healing Music perhaps? Magnetism doesn't work that way either, but you just sort of roll with it... If it's any consolation, seeing Blake capable of using dust along with her Semblance, perhaps the teacher also uses a sort of restorative dust infused with her sound strikes (When she wants it to of course) for the purpose of healing others.
[/quote]

Unless we stumbled into Fairyland I don't think that really works. I realize we're dealing with having super powers here but there should at least be a string of sense to it. The abilities of the X-Men are all explained even if the actual explanations are based in pseudoscience at best. If she is in fact using some sort of healing dust and her semblance is merely a deliver system then that's completely cool, but that's not what shadowkiller912 said.