Collaboration...maybe to be more accurate needs a few people disagreeing. I originally drew this because I'm trying to get involved in the Wikipedia Educator Project, which has many blog posts worth of challenges. I've removed the nc so that it may be used in Wikipedia itself.
The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
http://creativecommons.org/publicdomain/zero/1.0/deed.enCC0Creative Commons Zero, Public Domain Dedicationfalsefalse