Well, I for one object, and they're worth a blog post.
The problem is: how do you judge the teacher's actual performance? How do you separate this from the abilities of their class? How do you know, empirically and repeatably, that they're better than another teacher?
The answer is: you can't. A teacher's ability to teach is an intangible thing, like an artist's ability to create. It covers not only the obvious skills of passing on information and concepts, but also their ability to engage the class, work with good and bad students, and to keep the whole group interested and active. The best teachers I've had have not been those in which my entire class did brilliantly, or where our class's results were demonstrably better than the others. They've inspired me, sure - but maybe other people in the class still found it a chore, or just didn't care that much about the subject.
And we've already seen teachers cheating on marking students' work to make sure their class gets a better grade. Link that to pay and there will be a much bigger reward for that kind of bad behaviour. Then you have to have all sorts of extra supervision and suspicion, which costs money to implement and hurts morale. And exactly how do you say "this person's artwork isn't as good as you marked it"?
And how do you reward the teacher aide who got given the entire year's worth of difficult students to babysit while the teachers went off and rewarded their talented students? By assessing how their problem children went? This happens even now.
Morally, judging one person by the performance of other people is wrong, especially when those other people are affected by a lot of other factors besides the teacher's 'ability to teach'. Would one suggest performance pay for police based on the amount of crime in their suburb?
And practically, no-one who suggests 'performance' pay for teachers also suggests increasing their average pay. So it's only rewarding those that artificially do well by cutting pay from those who already can't afford it. This doesn't trim the fat, it only makes the back-stabbing and cheating pay off more.
The larger question is really "what will it take to get teachers to be better respected in our society?". The answer, in my opinion, is three fold:
"It will be a great day when schools get all the money they need and the army has to run a cake stall to buy a tank."
All posts licensed under the CC-BY-NC license. Author Paul Wayper.