Creative Commons is a flexible copyright license which allows a work to be copied and shared. Open education resources are by definition "open" - accessible and reproducible - and are frequently licensed by Creative Commons.
There are six types of Creative Commons licenses, with varying degrees of openness. This chart will help you distinguish between them:
Creative Commons licenses by Foter (CC-BY-SA)
Creative Commons makes sharing and utilizing knowledge free and easy. To apply the license to your own work:
1. Use the Creative Commons license chooser to select the license that's right for you project.
2. Copy and paste the generated logo onto your work.
That's It!
Remember that every Creative Commons license requires attribution. This means that you must acknowledge the source of the original work.
In your attribution, include the Title, Author, Source and CC License Type of the work. For example:
Adapted from "Technology Today" (www.technologytodayart.com) by Lewis under Creative Commons 4.0.
The important thing is not the format of the attribution, but that you acknowledge the original author and license.
This quick guide to attribution from New Media Rights can help you further.
You can also find more detailed information about attribution here, including for various media types and circumstances:
NOTICE OF NONDISCRIMINATORY POLICY AS TO STUDENTS
The New York Medical College admits students of any race, color, national and ethnic origin to all the rights, privileges, programs, and activities generally accorded or made available to students at the college. It does not discriminate on the basis of race, color, national and ethnic origin in administration of its educational policies, admissions policies, scholarship and loan programs, and athletic and other school-administered programs. See full non-discrimination statement with contact info.