Thanks! If you've already read the AthabascaU open module, that might not be too hard (not that I've ever tried to skim just the section and chapter summaries without having read everything else before in order, and can't do so now, of course.)

Honestly though, I have to keep coming back to the argument: "The results from Project Follow-Through show DI walloping all competing models (including the default 'traditional' education), and the meta-analysis of all the other studies doing direct experimental comparisons says that's typical, so that phenomena needs an explanation. One very likely candidate for that necessary explanation should be that DI theory actually knows what it's talking about, even if it seems very confusing at first."

Which seems like a damn reasonable argument to me, but...