Here is a great example of clever, problem based, instructional design.
It’s a series of short online “whodunnit” games that teach safe use of social network sites.
The problems based around a story. The content is located in a series of dummy sites which you have to search in order to answer the questions posed by your online friends. The overall look is pretty slick but the technical design of each problem is very simple.
It’s aimed at teens, but based on some of the dodgy Facebook privacy setting I’ve seen I think most adults should also have a go.
http://www.smokescreengame.com/
Enjoy