The injustices of the present need to be solved still. In America the way schools are funded in many states is such an obvious shorthand for racist school funding there isn't a level playing field.
I would suggest it's more along poverty lines than race lines. If you fix (well improve) the poverty rates it helps all races across the board. I think our emphasis is completely off base, education outcomes track with poverty a lot better than race.
This isn't true. Underfunding is not the issue with underperforming schools in the US. If you want to improve outcomes in inner city schools you need to fix the broken local culture first, but it's sort of chicken and egg.
That was the first link that came up on ddg, but it's laughable to presume that vox isn't just as biased, just in the other direction. Here's a couple more on the subject. I suspect you won't find a left leaning source with this opinion because it would undermine one of the primary ideals behind modern progressive thinking, that all groups of people would magically achieve equity and equal representation across all domains if only presented with the same opportunities.