Thanks for the suggestion, Ken. We use quizzes as learning modules, assignments tests and exams. I agree that quizzes aren't the perfect vehicle for assignments - we've often wanted a better way to handle late submissions, too - but we get by OK, and having the same environment for all the course activities is a big plus. So while I like the idea of having an assignment plugin that hosts multiple quiz questions, it's not a project I would want to get involved in myself.
Do you know about Open University's 'embed questions' plugin set, that lets you embed questions anywhere? Presumably you could embed questions in the assignment specification and the Embedded questions progress filter records students attempts so they could be marked. It might perhaps be possible to add another plugin to the set to (somehow) convert all the attempts on questions into an assignment submission (though I know very little about either the embed questions plugin set or the assignment module, so this might be infeasible).
Do you know about Open University's 'embed questions' plugin set, that lets you embed questions anywhere? Presumably you could embed questions in the assignment specification and the Embedded questions progress filter records students attempts so they could be marked. It might perhaps be possible to add another plugin to the set to (somehow) convert all the attempts on questions into an assignment submission (though I know very little about either the embed questions plugin set or the assignment module, so this might be infeasible).