I believe child upbringing really matters a lot especially from the parents who have all the opportunity to train them to the right path by showing them good example. No doubt teachers also have a role to play in children's lives but I don't buy the idea of putting 100% responsibilities on them to look after such children because I believe they also have theirs too as well to take and look care of.
But the positive impact from the parents will actually help them grow with your effort to make them eradicate negative things because from child birth all they need is the love from the parents which will definitely show the character of the child on which way to follow but at the same we can't decide for them when they are matured but only just play the role of a good parent.
This is a problem these days as what many show is, how to stare at a screen.
We can only ever do our best, but this doesn't mean we can't learn to be better.