If it can be shown that the kids are being taught the Koran in a way that classifies as as somewhat a lower class, that school should have charges of racial discrimination laid.
I don't think that one can lay racial descriminatioon against the Koran, it would be too explosive despite the fact that it is just that.
But targeting individual schools to prove that their students have not bben indoctrinated in any way, will put them on notice quick smart.