I've been teaching WD as part of my 2 academic courses for the past two years. I had one 1.5 hour session dedicated to it, where I introduce ways of contributing and ways of using the data. Their task is usually to add info regarding the Wikipedia articles they wrote to WD.
Students usually really like the WD Games. They also like things like Histropedia, the timeline tool.
I know Andrew lee has also tried the latter that this year and created a session where his students creayed a timelines to explore something.
Other than that, I'm unaware of other efforts to teach with WD, but since I'm also working on developing a separate elective about it, I'd love to see what you come up with. :-)
Shani..