I've realized from the discussion regarding TCDrupal sponsorship of events, there is enough of a critical mass for me to decide that open sourcing the curriculum for Enjoy Drupal: Site Building Basics is the way to go. I've been telling folks informally that I'm happy to share it so long as they don't charge for the event, so why not make it "official"?
But what does that mean exactly? Is it as simple as providing a link to download the resources I use to teach the class (such as Drupalize.me's Community Tools curriculum)? Do I need to decide between a particular open source license (GPL, MIT, etc) and create rules for fair use?
With the goal of empowering the local and abroad Drupal community, what makes the most sense?

Comments
I would recommend choosing a
I would recommend choosing a license for sure. http://choosealicense.com/, if for no reason other than the absence of a license means that default copyright laws apply. This means that you retain all rights to your materials and that nobody else may reproduce, distribute, or create derivative works from your work.
The other thing that I think is really important is providing some kind of "instructor guide" to go with the materials. It's really hard to just take someone else's slide deck and use it without a lot of background on why the slides exist, why they are in that order etc.
I know for the community tools stuff that Dupalize.Me has done we've only really started to see people making use of our curriculum after they've seen the workshop performed, or even assisted in performing it on their own. It's just really really hard to teach someone else's materials without a lot of background info.