What we need is a zero-idiocy policy.
You start a true zero policy by tasking the county school board to take a dope test twice a year (random pick). You go to the teachers and demand random tests period (could be once a year, could be twelve times a year). Then you do the same thing for students. I suspect that we could toss a quarter of all the teachers in the US out...if we had a simple situation like this.