On a follow LS566er’s blog the discussion of screencasting was brought up.
Mostly how much harder it is to do than it is to seem. I think this is mostly because rather than an academic exercise, it is first and foremost a performance art. To become good at a performing there is only one thing you can do: perform. Everything else is accessory. I had a music professor tell me that if we were not bound by structures that worked well for academic classes that there would only be three courses in the department: theory, lessons, and class gig!