Ivan This could be useful for "mini discussion groups" for students who want to collaboratively solve a math problem. Jane says "join me in sublevel.net/re/1123/ to discuss Problem 2.2" then a mini-discussion ensues and the problem is vanquished, of course.

🙄 Doug Belshaw Agreed, like a pop-up group. Given that original poster can delete replies, there's anti-spam measures too!