That sounds horrible. Right now, schools try to give each teacher an even number of high-performing, average, low-performing, and “difficult” kids. But the numbers are so small it’s hard.

An average sounds like a shitty, shitty system. Imagine finding out your kid is in a classroom with every low-performing and difficult kid in the grade just because it was random.

The concept sounds good in theory, but I think it's going to be nigh unworkable in practice. The NCLB/high-stakes testing era exposed many problems with tying educator pay to student outcomes -- chief among them that student outcomes didn't improve.

As I recall they had the teachers themselves graded those tests, so naturally they cheated.