Thinking about this over while I swam my laps and I suspect that prep will significantly improve DS's on the math. Less so on the reading. Test prep is not likely to make my son a faster reader and pushing him to read faster is likely to make him mess up more on the earlier problems.
But on the math there were tricks to some of the problems that make them a lot faster. A few problems he got stuck on because he was making the problems too difficult. I can see your problem with the standardized test centers. Hmm.. maybe I need to rethink this.. maybe I hire a college student to "tutor" him. We both agree DS needs some external (not mom) babysitting through the practice sections.
