Effort, desire, help from home, encouragement from home, expectations from home... those are the main predictors for 98 percent of the results in the classroom.
(I'm less than 10 years removed from public school teaching, so I'm not THAT antiquated quite yet.)
(But it wasn’t the white parents that came to parent-teacher night to tell me that school didn’t matter, and that the kids were only there because the law said they had to be.)