Any family worried about food / clothes can come into the pantry and take whatever they need. Physiological needs, check. Barbershop available. That's really interesting.
Safety needs: see above, with heavy emphasis on dealing with conflict situations. Celebrate coming to school, make sure it's always a safe place, extra hours and days to keep them off the streets.
Belonging and love: everyone in the school are the "chosen ones", they have a tribe, the teachers are on their side, the parents are involved and accountable.
If you handle the first three levels for a person, hitting self esteem, accomplishment (at a personal level, need not be state's best or world's best) can come much easier, even with average quality of teaching. They're also making the parents baseline role models (they clean, clothed, putting food on the table and looking into their own self improvement) and plastering the environment with a topline role model LeBron James (if he can do it you could at least try as hard as he did).