You can't teach/train/modify anyones behaviour with just one quadrant (of learning theory).
These quadrants do not happen in a vaccuum, do not happen in isolation and also require other factors.
Positive reinforcement works fantastically well (read Karen Pryors 'Don't Shoot The Dog' - not in fact a dog training book at all!!), however it requires the use of negative punishment - the removal of the expected reinforcer, to balance out.
In practical terms, to do this you must have control over the valued resources, primary reinforcers and the environment in which the subject operates.
This simply does not apply to children, particularly other peoples children and particularly outside the home.
It works brilliantly with dogs, cats, rabbits, orcas, butterflies, chimps, gorillas, tigers... the list is damn near endless but the fact is, we can control their environments, access to resources, and to primary, secondary and tertiary reinforcers.
Positive reinforcement also requires us not to put the subject under so much stress that they go 'over threshold' and can no longer process and learn properly.
And schools are one area where children are very likely to be over threshold much of the time.
Homes should be a sanctuary, a place of calm and peace where people can rest - unfortunately with the need for both (assuming there are two) parents to work being unavoidable for many families and the time people have to spend at home relaxing being vanishingly short...
And add in the modern tech that means we're always available, always 'on', never experiencing downtime from the minute we open our eyes to the minute we go to sleep...
Home is often not the environment kids need to grow and learn in either!
I haven't got any solutions (well I have but they're far too loopy lefty to ever become reality so theres no point wearing out my keyboard), I am just a dog behaviourist. Unless something changes, the species is fucking itself, into oblivion.