If you'd like to know why kids are being drugged, don't look to teachers, look to drug companies.
I worked for a psychiatrist involved in a large study of kids with behavior issues, here in Pittsburgh.
You could have put a sign on his front door This Home Phurnished by Pfizer Pharmaceuticals.
He was well supplied with office equipment, all bearing the logos of various drug companies.
One of his kids is diabetic. He got the diabetic supplies for free from those same companies.
His wife was a screaming hypochondriac. He got her supplies from the same companies. (I think she married him just to get a steady supply of meds.)
Then there were the medical conferences the drug companies sponsored, at places like Honolulu and San Francisco. Of course he had to pay for his airfare and his hotel room, and his wife's shopping habit. But he could deduct the airfare and the hotel as a business expense.
All he had to do was push their product, and he does.