Thanks to Joyce Valenza and Melissa Techman for pointing out this handy explanation of the ins & outs of creative commons licensing! Neeru Paharia, Ryan Junell and Matt Haughey did a great job in explaining a topic that is confusing and frustrating to many users who don't think about these copyright issues daily! Especially useful are the examples they give of when a user might want to use each license. This is a very practical guide. I'm embedding their presentation below so I can remember to use it in professional development w/ faculty & students.