The common orthodoxy is that the achievement gap is caused by and solvable through the schools, but the reality is much different.
Interestingly, the achievement gap between black kids from two-parent households is almost non-existent, however since 70% of black kids are in single-parent homes, the effects of those homes is borne out in the statistics — but the cause is misattributed. “Black” students are treated as a homogeneous group, but really the gap is between “black students from single (or no) parent homes” and white students (of which the majority are from two-parent households.)
The destruction of the black family is what is really behind this so-called achievement gap. The origin of that destruction is a discussion for another time, but the Moynihan Report foretold this back in 1965. The Coleman Report from the same period, also described the achievement gap as being primarily originated from the family, rather than schools. [1]
This article is long, but it relevant: https://www.city-journal.org/html/black-family-40-years-lies...
[1] https://www.chalkbeat.org/posts/us/2016/07/13/50-years-ago-t...