I'd agree that it's not fully solvable by the school alone. But zooming out, I'd be inclined to say the "society that forced a mother to work 3 jobs to get by" failed. I imagine it's hard to give each child individual attention/care when you're spread that thin, hence being essentially forced to offload chunks of that parenting-responsibility onto institutions.

Which is a much larger and harder issue than a failure of individual responsibility. But it seems like that's the more foundational issue as far as I can tell.