I see that to a point: but a teacher always wants 100% the easiest path. If their "generate pupil report" button (guaranteed to be their #1 gripe writing reports :D you should here my mum are report time!) requires them to have used the inbuilt school system to set assignments then they will just use that - no matter how much better your way is (dont get me wrong, I think it's damn good - I wish we had had this kind of thing!)

I think my main point was that it is a 8great* way to approach this problem - but it needs a bit more on top of it to really sell it to a mass audience (IMO).

I could well be wrong, I have been many time before :)