Do you know teachers who work in these sorts of schools? Many are there because they are barely competent and were reassigned because they can't be fired. They are there because it keeps them employed but gets them out of the better schools and into a place where the parents won't complain about them (because the parents are are totally disengaged). Or, they are teachers who once cared but have been there so long that they are totally jaded and are just counting the days until they can take their pension. You simply cannot work for years in a totally disfunctional, hopeless situtation and keep trying, unless you are a very rare individual.