OCW uses the Creative Commons Attribution-NonCommercial-ShareAlike license, so you can do all sorts of things with what you find on OCW as long as you follow three simple rules:

1. Tell people who the original author is.

Suggested citation format:
[Author Name], [Course Title]. JHSPH OpenCouseWare, http://ocw.jhsph.edu. Creative Commons BY-NC-SA

Sample:
Jon McGready, Introduction to Biostatistics. JHSPH OpenCouseWare, http://ocw.jhsph.edu. Creative Commons BY-NC-SA


2. Make it free.

On your blog
To your students
On a website
In a video
To your friends
In a presentation
To your patients
To the world

3. Give what you make the same license.

Use the icon:

Or

Use words: Creative Commons BY-NC-SA.

Learn more about the license.