And those kids with greater IQs will become smarter with less effort on the part of the teacher. I would think that if you took into account whether a class wa

And those kids with greater IQs will become smarter with less effort on the part of the teacher. I would think that if you took into account whether a class was regular or accelerated and weighted the required improvement based on that, you would be able to accurately assess teachers. But maybe the sample size is too small to eliminate random biases. Perhaps by taking a teacher's performance over multiple years into account that issue could be eliminated as well.