They could write the book on this stuff

Rising from the depths of my summertime silence, I surface only to say this: this coming semester I'm going to try to get my 280 students to write their own common set of course notes, suitable for use in a future version of the course.

I've yet to work out the details, but I've realized that it's only a short step or two from the writing and peer-review activities they've been doing for the past few iterations to this more ambitious project.

Than this one no task could better challenge them to understand key concepts, construct their own apt examples, and clearly communicate their discoveries.