Many US urban schools have arrived at the point where current students labelled "at risk" are second generation in this category. Their parents and grandparents were failures of the public school systems in their day. This stacks the deck against current gen success in public schools, especially in the way they have become more disengaging and parent engagement and competency levels continue to be critical factors in student self-efficacy and success.
I propose that, in every possible case, parents and grandparents go to their children's schools to learn in the morning and teach children in the afternoon. It doesn't have to be every parent every day, but every instance of this dynamic will increase potential for student success.