“They never discuss the dangers/negatives if the kids DON’T go back to school.”
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And the fact, to a near certainty based upon what we know now, that those dangers/negatives hugely outweigh any that come from full reopening.
An idle mind is the devil’s playground. It’s pretty common that a kid who was doing some serious trouble or criminal activity was skipping school or on suspension while they were doing it. Now imagine not having school in session, and how much worse it could become with many children and teens not needing to report into school.