Learning form one of these 3 examples:

def   http://creativecommons.org/education: "teaching, learning, and research materials in any medium that reside in the public domain or have been released under an open license that permits their free use and re-purposing by others."

exereices https://p2pu.org/en/groups/get-cc-savvy/content/the-right-license-for-the-job/ for what I'm thinking, under "Exercise." Or https://p2pu.org/en/groups/teach-someone-something-with-open-content/content/go-find-your-resources/ under "Discussion" and https://p2pu.org/en/groups/teach-someone-something-with-open-content-part-2/content/edit-and-change-the-resources-as-needed/ under "Exercise."

DO

Answer in the discussion section: Which was the last Journal that you read or purchased? Do you know if it was open access? If not, investigate. Was it Green or Gold?