(Jonathan Wylie just left a comment identifying some inappropriate classroom content, so I’m removing Blurt It from “The Best..” list. Thanks, Jonathan!)
Blurt It is a new site where people leave questions and others can write their responses. It seems pretty easy to use, and, in a quick look, I didn’t see any inappropriate content.
I’m adding it to The Best Places Where Students Can Write For An “Authentic Audience”, where it joins several other similar sites.