But if they are paid if their child achieves a certain level on state exams, they may want that?
Ross Perot helped develop merit teacher pay/standards 20 years ago in Texas. I was involved at the Education Service Center level. (There are 20 of those in Texas, to help small districts with curriculum needs.) The administration hired people to 'grade' their teachers, as well as training local administraters to do this. I had 3 principals tell me - guess who will get on the career ladder - my wife works for him, his wife works for me - it is money in my pocket for my wife to do well. The system has changed, costs more money, more non-teachers hired to 'evaluate' teachers. Teachers are not doing that much, if any, better.