I’m not a big fan of Value-Added ratings, but researchers have just published a big study finding that both low-and-higher income schools have a similar mix of good-and-bad teachers (measured by VAM), and that the real issue behind differing student achievement are the outside supports they receive.

In other words, though they don’t come right out and say it in their article about the study that I linked to, it’s based on socio-economic issues.

Of course, their conclusions aren’t new, and they even make that clear.

I’m adding this info to The Best Places To Learn What Impact A Teacher (& Outside Factors) Have On Student Achievement.