Harold,

I did this same workshop just the other day, only I was limited to two hours. One of the resources I used was Quentin D'Souza's Teaching Hack's wiki page for its resources.

As for their setup, 21Classes worked well for me, and it's fairly easy to set up and go. My staff understood it quickly enough.

Also, I have found that "The Machine is Us/ing Us" video goes over the heads of people who are not familiar with technical language. Just a thought.