world-shaker:

TodaysMeet is my new favorite tool

You can create a free (and ad-free) backchannel with an expiration date. Just give the link to your students. All they do is enter a name and start typing (140 character limit per post). 

There’s even a projector view if you wanted to display everyone’s comments up on a screen. 

It’s dead simple and does exactly what it’s supposed to. Want to give it a try? Here’s a room for Education Dare Day.

(Note for time-travelers: This link expires a week from today.)