Jeffrey Thomas writes:
Some recent research (in Florida schools) indicates benefit from using a randomly-selected sequence of student names for in-class discussion: that is, the teacher uses the random list in order to decide which student to call upon for the next question.
There is an email-based tool that I've used in the past created by Harvard Law School's Berkman Center called the "Rotisserie" that is somewhat different than what you describe but similar in spirit. It's a modified discussion tool in which everyone is required to answer a question, and then each person is assigned another person's answer to respond to. In functionality it is like the workshop, but entirely web-based (no attachments).
Is that anything like what you're describing? It's not something that exists in Moodle, either, but I've been hoping to get someone to create it, as it's in line with the way we'd like to teach.