You ooze the networked learning spirit 🙂
This is a very good example how one can scaffold students explore a networked learning tool such as Twitter, reflect and appraise it for their professional development and practice.
These are mature professional students so perhaps it would be a good idea to only provide them with a few introductory resources (rather than providing them with a lot of content materials or pointers to sources) and let them come up with more of it themselves (perhaps permit some space for appraising conquests as well as you go along) … this may also help initiate them (or refine their skills) of free-falling networked lifelong learning and development.
Put into practice for me this would be an example where work, learning and entertainment intersect.
It would be interesting to know the outcome of this teaching (and learning if volunteered) experience.