Minorities don’t fail schools; schools fail minorities. (sarcasm) In reality, a lot of the problem with minority heavy districts is the use of racial quotas to stack the teaching staff with unqualified minorities. Because the minorities who are qualified to teach are working in higher value jobs they are also unqualified to perform, thanks to racial quotas for those other jobs. The thing with racial quotas is that it’s turtles all the way down.
As a practical matter, any qualified non-minority teacher who will flunk underperformers will be decried as "racist".
That problem has been around since forced integration, as non-politically correct as it is to say so. Heck, just pointing it out would be considered "racist", and I saw it first hand.