I had heard rumors about it. The first time I really believed it was when a friend of mine was student teaching and was forced to give no less than 50% if the name was on the paper. He said there was one kid who refused to even write his name to get that free 50% and they gave him an incomplete or something instead. I probably wouldn't have believed it until he told me about all this. He ended up getting his teaching license but never taught due to how bad the schools were policy and behavior-wise. I have other friends who are teachers and I'd say close to half will only teach at private schools for those same reasons.