Richard Stallman skriver intressant om användningen av CC-licenser i utbildning:
Creative Commons publishes six principal licenses. Two are free/libre licenses: the Sharealike license CC-BY-SA is a free/libre license with copyleft, and the Attribution license (CC-BY) is a free/libre license without copyleft. The other four are nonfree, either because they don’t allow modification (ND, Noderivs) or because they don’t allow commercial use (NC, Nocommercial).
In my view, nonfree licenses are ok for works of art/entertainment, or that present personal viewpoints (such as this article itself). Those works aren’t meant for doing a practical job, so the argument about the users’ control does not apply. Thus, I do not object if they are published with the CC-BY-NC-ND license, which allows only noncommercial redistribution of exact copies.
CC-BY-SA borde vara OK för presentationsmaterial, men CC-BY-NC-SA är en jag använt för tidigare arbeten.