"Creative Commons Licenses" is licensed by Knox College under a CC BY-SA 4.0 International License.
The Creative Commons site has a simple way to choose a license for your work. Try the license chooser or the new beta version of the license chooser.
A decision to use a CC license on a work not only involves the type of license, but other considerations:
Faculty: See the blog post "How to Use Creative Commons Licenses for Your Academic Papers."
Students: See the ebook Finding and Using Openly Licensed Images: A Quick Guide for Students.