Talking about student growth

I want to give some more thought to this before opining, but I thought others might be interested in this New York Times piece in "The Upshot" on student growth scores, and the research from which it comes. The Times article has a "gosh, the poor kids can be learning faster; whodathunk?" tone, but the bit where you can add a district is interesting (Worcester essentially gets kids to and keeps them at grade level), and it at least turns us away from the still-too-often measurements in which learning tracks with wealth.