Portia - thanks, thanks so much for asking and posting this thread.

We're in your ETA stage with our ds. I do know that some MOOCs have quizzes/tests which you can print and possibly submit as part of a transcript, if that helps.

MIT claims on their homeschool admission page to consider their OpenCourseWare - http://mitadmissions.org/apply/prepare/homeschool

I do think MIT and other universities are (and will be) increasingly using MOOCs as a recruitment tool. MIT is known for taking kids at age 14, but I haven't heard of them taking kids younger or how they regard kids under age 13 taking MOOCs. But I'm curious to hear what others may know or have heard through the grapevine.

Simon's Rock takes kids younger than 13, but that's another can of worms, I think.