> But if we extend the notion of learning styles to "some kids lack self-control" or "some kids have trouble keeping attention"

That’s situating the problem in the wrong place. Everyone lacks self control, or has trouble keeping attention depending on the circumstances.

I agree with you that our schools are crap. I also agree that not all kids can be taught everything to the same level.

However that is orthogonal to the notion that kids can be taught to their potential if you allow them to be taught in an appropriate manner.

That ‘teaching styles’ link is accurate, but it deals with a straw man that results from not being willing to question the constraints of school.