Can’t explain it. Is it our foods? Is it something else? Who knows? But you can’t tell me it doesn’t exist ... I’ve experienced it first hand. And the medications available have come a long way since that Ritalin crap was used.
I can explain it easily enough. DISCIPLINE and the KNOWLEDGE the student is responsible and accountable for all their behavior.
It worked before and it will work again. Get the F’n lawyers, hand wringers and bed wetters OUT of the classroom and make these children (and their parents) understand from day ONE in the school systems that bad behavior will NOT be tolerated.