When you take away having to deal with problems, good things happen. LOTS of resources can turn toward creating academic achievement. That's how. In my town we have a scourge of overachievers who should be told to go fishing. That's the extent our problems.
The real issue is what causes the problems in poor school districts: Is it being poor? Being black? Are the people who blame "black culture" right? Or is it how we treat the poor and black people, from a very young age?