Students who have parents high in the negative factors listed below tend to do poorly in school.
1. Unable to speak English fluently
2. Poorly educated
3. Abusers of alcohol or illegal drugs
4. Divorced or have marital problems
5. Of a low socioeconomic level. (A more accurate predictor of academic achievement than IQ)
6. Abusive to their children.
Private schools tend to have fewer of these problems: consequently, non-public schools tend to fare better. To have students from families high in these negative factors transferred to private schools or to provide them with different administrators and teachers would probably do little to increase academic achievement.