Seduce them with style
Writing about web page http://www2.warwick.ac.uk/elearning/aboutus/steve/flash/questionwriter/
Have a look at this elegant example of an "interactive self-assessment quiz" written in the Flash-based software QWriter (click the URL above). I'd take this test again and again just for the pleasure of experiencing its cool and stylish interface. It offers a wide range of question types, presents mathematics well and shows its scientific paces from GCSE to University level in this Chemistry test.
What is not clear is how much effort went into authoring this example; I suspect you need to be an academic chemist and a graphics wiz who can write Actionscipt to produce something like this. I want to find out more. Watch this blog.