Grew up near an inner-city school district that underwent multi-decade federal court supervision. Ordered per-pupil funding was the highest for any district in the state, careful monitoring by nearby University personnel, etc. The overall effect was somewhere between minimal and non-existent.

No idea how this gets fixed, but it's not money. If the culture among the cool kids is that it's not cool to learn, not cool to try, you can pour in an ocean of money, and it won't matter.