While I'm not completely against performance-based pay, there are some issues that would make this particular approach unworkable.
One is that in dealing with children, personal compatibility matters a great deal more. Some teacher-student relationships will "just click" and others fail.
Another is the dependence of the students' performance on their home environment.
So, even an excellent teacher will get poor results when working in a disadvantaged district. These things would have to be taken into account when designing a reward system for teachers.
A proper proposal would be a lot more words than my little posting!
It doesn't have to be perfect. It just has to be significantly better than the existing system, which has zero incentive for the teachers to get results.
Except, of course, wanting to educate -- which is ostensibly the reason they got into the profession in the first place. It probably wasn't for the pay.
Every job has its drudgery, no matter how much someone wants to have that job. I would also expect teachers who love to teach also want to teach those eager to learn. This is about teaching those who are not so interested in learning.
Also, you can't say teachers are poorly paid by neglecting they only work 8 months of the year, have a gold plated medical plan, and can retire with a lifetime very generous pension.
One is that in dealing with children, personal compatibility matters a great deal more. Some teacher-student relationships will "just click" and others fail.
Another is the dependence of the students' performance on their home environment.
So, even an excellent teacher will get poor results when working in a disadvantaged district. These things would have to be taken into account when designing a reward system for teachers.