I saw the kids I taught five hours a week. Their families see them much more (hopefully, though often not because mom's single and working two/three jobs to keep Alice and her younger brother fed and clothed). Who do you think is going to win the influence battle? And, really, when Alice has to go work to help support the family, how much do you think she really cares about homework or school? I'd go so far as to wager that most educational problems in the State stem from socioeconomic ones.
School cannot overcome parents at home, sadly.