Attribution-ShareAlike
According to the above mentioned licence, it lets others copy and redistribute the material in any medium or format. The content of your work may be remixed, tweaked, and built upon even as long as they credit you, and their new creations are licensed under the same terms. As well, the contributions must be covered under the same licence as the original material.
For the course that I am writing, I would use the above licensing. As I am as much of a student as I am a teacher in designing an online course, I want to learn from others. If someone has ideas in tweaking, or remixing my creations, I would want to see how they have made it their own, while recognizing myself as the original writer. Teachers don’t like reinventing the wheel, but at the same time, feel that it is important to recognize others for their contributions. Most of my resources for creating my course were collected online from Open Source licenses, and the course, I am hoping, would be free to students, without benefiting financially. This course would be well suited for non-profit public institutions.