What common core is trying to do, and I’m assuming a positive intent when I say this, is to speed up the education process by skipping over more basic steps and hope the child will figure out those basic steps on their own.
However, it will be a disaster. If you take a look at older textbooks and compare them to the present, it is clear that the amount that children had to learn has been falling steadily for the past 50years. We’d be better off if we could throw out every math textbook and just reprint the one from the 1950’s.
I don't know what common core is trying to do. I have yet to actually see a common core workbook. My only exposure to it has been here, on FR, where it's taken out of context.
32 - 12 = 20. Yes, we all know this, and it's simple to do from memory. Then someone provides evidence of common core teaching another approach to solving the very same problem (which is kept simple on purpose), and my fellow FReepers immediately and irrationally jump to the unsubstantiated conclusion that the fundamentals have NOT already been taught in a previous chapter of the very same workbook.
If we want to put forth a logical and rational reason to reject the centralized control of common core, ignorantly knee-jerking into a two minute hate routine over a misunderstood math problem isn't the way to go about it.