When I was young parents were hardly involved in schools much at all. And that's when a lot of mothers, at least middle-income and up ones, were not working. My mom went to PTA meetings, back-to-school night and parent teacher conferences. That was it, with a possible field trip or two. My parents were minimally involved in my schooling, same as the parents of my friends. And they had a lot more time they could've devoted to it, or at least my mom did. Yet education was much better then. The boomer parents also felt education was important. The GI bill allowed a lot of people to go to college that never would have otherwise. The boomers devoted a lot of money to K-12 education. A lot. They didn't mind paying taxes for that purpose. It was that important to them.
Poorer households are more likely to have parents that work low-paying jobs that provide no vacation or sick leave time. If they take time-off they lose wages, which they can ill-afford to do. How much can they be involved? A lot of poorer income families work multiple jobs, so they aren't much available in the evening either. Since poorer income parents usually have less education, they're less able to actually help kids with school work. That's even more true for parents with minimal English-speaking skills.
All they can do is try to instill the importance of education, discipline and responsibility in children, but they have formidible odds against them. Being born white, middle class in the USA of the 1950 was my hugest advantage in life.
Charter schools aren't an acceptable answer unless you require them to take their fair share of the special education, non-English-speaking and "problem" students. Because they don't have to accept them, public schools are left with the lowest achievers and the students that cost the most to educate, by far, like special education students. And if you're poor and the charter school is far away, how do you pay for the transportation, if its even available? And no matter how much of a voucher amount could be handed out to pay for education, the more elite schools will just charge more and eliminate poorer kids that way.
Our forefathers created public libraries and public education, becasue they understood that democracy will work best when everyone has access to education and knowledge. (Of course, they weren't worried, at the time, about non-land owners, women or blacks, because they couldn't vote.)
I won't post any more on this as its way off-topic and this may already get deleted for being to political. That's my fault. Mea culpa.