We have been interested in developing training tools for various diseases (inherited eye diseases, deafness, cancer, and others). Here is a nice site that provides "radiology tutorials." Nice example of using images, image annotation, and wiki-style background information.
The site is here:
http://radiologymasterclass.co.uk/tutorials/chest/chest_pathology/chest_...
It has a "test yourself" section too:
http://radiologymasterclass.co.uk/tests/quizzes.html
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