A common theme: These are all strategies that can augment in-class activity.
Piazza.com: A discussion forum that allows students to answer other students' questions (in a revisable wiki-like entry); it works best with conceptual vs transaction information/discussion.
How do you get students to answer the questions? Seeding some straightforward questions (like when office hours are) so students become familiar. Or start conversations in the class and put the follow up questions on Piazza. Or force students to the site for FAQs on syllabus-type questions or homework clarification or delivery of additional notes.
Other tidbits:
- You can enable anonymous participation -- or anonymous among peers, but known to you.
- Students can answer/discuss at their own pace.
- It's a way to link discussions among classes.
A caution: It can lead to extra prep time. You really need to evaluate the cost vs the benefit.
NowComment.com: Allows you to upload and discuss a document online in a less messy way than Google docs. It's built along the lines of a threaded discussion with anchor points within the document. Potential uses: For peer review (a way to model and/or take the workshop outside of class); for readings (students can comment on/discuss the text inside or outside of class through this web-based program); for teaching annotation practices.
Jing: The discussion was specifically how it can be used to extend discussion outside the classroom and how it might be used in concert with the other programs. A good question to consider: How can these platforms work in concert to enhance student learning?