Well, first of all, we did lots of studies where we show practical intelligence doesn't correlate with G. We have probably two dozen studies that practical intelligence better predicts job success than IQ.
And if we don't have a test, what we may end up doing is going back to what this country has done before. We could use social class and we still do, but in the 50s, it was, do you have the right last name and are your parents in privileged positions?
Well, I don't think that the SAT is a scam.
But in any case, I did poorly on the tests and so, in the first three years of school, I had teachers who thought I was stupid and when people think you're stupid, they have low expectations for you.
So, for example, if a child is labeled as having a learning disability, it has very concrete consequences for the kinds of services and potentially accommodations that child will get.
There is no recipe to be a great teacher, that's what is unique about them.