Attribution Share-Alike: You allow others to distribute derivative works only under a license identical to the license that governs your work. AND all Derivative works must be shared under the same conditions that the original author shared with you. You give attribution to original author.
Taken together, these three layers of licenses ensure that the spectrum of rights isn’t just a legal concept. It’s something that the creators of works can understand, their users can understand, and even the Web itself can understand.
Creative Commons provide tools CC0 tool allows licensors to waive all rights and place a work in the “all rights granted” space.The Public Domain Mark allows any web user to “mark” a work as being in the public domain. Placing Intellectual Property in the public domain prevents anyone from copyrighting and benefiting commercially.
All content licensed under a Creative Commons License can be Reused or Redistributed (i.e.Shared with others - such as in a Course Pack) without the need to contact the copyright holder. If you want to modify it in any fashion, you will need to ensure that the license does not contain a No Derivatives Works clause - which prevents others from either Remixing or Revising the content. You would want to have the right to make Derivative works if you wanted to: