I chose to teach about pipes in Unix, taken directly from the novice shell lesson.
Video on youtube. Some feedback I’ll mention (to avoid it being repeated) was 1. bigger font, and 2. fewer distractions (let terminal take up the entire screen). Other feedback would be much appreciated!
A note of caution to mac users who haven’t recorded yet - be sure to select a microphone before doing a screen capture with Quicktime – otherwise you won’t record audio! I ended up re-recording right after our group’s google hangout (too bad I forgot to fix the font size issue, eh?). This could have also been avoided by actually reading Greg’s instructions, rather than presuming I remembered how to screencap ;).