Asse my friend! How is LHV? I'm going to be in Europe again next month, if you can you must definitely join us in Germany for the meetup on the 24th:
http://forum.getmonero.org/14/events/237/monero-meetup-berlin-germany-may-24th-2015On to your post. I think the idea of a human-driven PoW is interesting, although I suspect you'll end up with something more like Mechanical Turk to hit some lowest common denominator (although the the "work" would be much harder to independently verify, if not impossible for most jobs).
An educational PoW is interesting, but I'd imagine you'd have to have a fixed curriculum and a fixed set of multiple choice questions, in which case there's an easy Sybil attack vector (it being impossible to uniquely identify a child vs. a computer answering the questions from a list). I think the line of thinking is commendable, but I can't see a way to do it without specialist hardware (eg. vein readers) to identify individuals and reduce the Sybil attack vector.