Creative Commons, the 5Rs, and OER
This is a presentation called "Creative Commons, the 5Rs, and OER: The Shortest Possible Introduction" that includes a clear and thorough discussion of the basics of the CC licenses and CC's other legal tools. It is licensed CC BY so you can adapt it for your needs (e.g., remove the slides about the 5Rs and OER if you don't need those). It's also unthemed so you can apply whatever visual styling you prefer. Further details and additional resources are available in the slide notes.