Piazza is a very robust and highly-intuitive question and answer tool with more features than the built in discussion forums that are often used for similar cases. Learn more about Piazza on their web site.
Lehigh University is already a school on Piazza and the tool is free to use. The following instructions will show you how to add a Piazza Q&A activity to your Course Site course.
How to add a Piazza activity to your Course Site course
With editing turned on, locate the topic section you want to add the activity to and click Add an activity or resource. This will bring up the Add an activity or resource window (shown above). Click External tool then click Add.
Under General, type a name for the activity in the Activity name field. From the External tool type drop-down menu, select Piazza.
There are additional fields and options you can specify including an activity description to provide extra detail to your students about the activity. You can see these additional fields by clicking the Show more... link.
NOTE: Under Privacy settings, there are three options. The first two are set at the system level and cannot be changed. The third setting, however, Accept grades from the tool, is a setting that is left up to the instructor of the course. Piazza's default is to have this checked. If this option is checked, it will add the activity to the grade book and additional grade options will appear. If you do NOT want this activity to appear as a grade item in your grade book, make sure this option is not checked.
Once you are finished, click either Save and return to course or Save and display.
If this is the first Piazza activity you are adding to your course, you will be prompted with a screen like the one shown above where you will be able to create your class in Piazza so you can add more Piazza activities as the course progresses.