There is a recent move a foot in San Francisco by the School Board to make it difficult to expel students for bad behavior. There is an effort to create mechanisms to keep the badly behaving students in school. The consequences of this are terrible.
This is precisely why the public school systems in the past 50 years have declined to the level of near incompetence. When blacks were bused to predominantly white public schools, they brought an increased level of danger to the white students. While danger had existed in public schools before, especially for boys, the danger increased inordinately. This increase in danger to their children is what led whites to flee the urban areas and led to the destruction of urban public schools.
Now the very same people who were blind to the problem in the first place, the do-good people who thought they were helping blacks are instead now making sure that the black schools will be evacuated by the few people who are willing to stay with dangerous kids in the school. This is the last straw.
Most black schools are now populated by very specific minorities: Filipino, Latino and ‘other Asian’. These people will leave just as rapidly as the white population did decades ago. Even if they can not afford to leave they will. The lives of their children's depend on it.