The Creative Commons license CC-By-NC-SA allows you to re-use this text as a whole, parts of it, and to change the content to create a new product. The license requires you to share your new product and does not allow you to make a profit from your derivative product.
A User's Guide for instructors provides ideas for incorporating the text into your course.
These works are licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
MLA Style
Chicago Style
APA Style