No subject

have tried, the most successful are ones where some effort is made to
screen topics for encyclopedicity and gaps in Wikipedia's coverage,
and/or the assignments are focused on interacting with the Wikipedia
community (i.e., content is posted early and students follow the fate
of their work over the semester).

For someone willing to seek out and contact a good number of professor
who have run Wikipedia assignments (there are a lot out there that
don't appear in news articles but can be found with creative web
search queries), there is definitely a good Wikinews story.  I did
something similar for the Signpost last year (
http://en.wikipedia.org/wiki/Wikipedia:Wikipedia_Signpost/2006-12-26/Wikipedia_and_academia
) but since then I think the number of people running such assignments
has increased substantially.

-Sage