What MCAS scores don't tell us

...and what teaching to it doesn't do...
It's worth giving this report from WBUR today about a new MIT study about MCAS scores and "fluid reasoning."

If you’re a kid who’s lucky enough to go to a school that boosts your performance on standardized tests like the MCAS, you’re scoring higher because you know more, but probably not because you’ve gotten smarter. And by smarter, I mean better at certain measurable cognitive skills that psychologists call “fluid intelligence” or “fluid reasoning” — like working memory and problem-solving in a novel situation.

You can find the MIT summary of the report here.