A note about groups, from a discusion today: If there are multiple classes, and students figure out how to change their nick &c, it would be helpful to be able to have approve-only groups to avoid griefers popping in and messing up a discussion or session and then leaving. froma previous discussion: > 2. Better models of groups (a child wants to share an activity > with the first grade, not the entire school.  How ?) | Our ideas for groups so far have been centered on the idea of children opting | in and out of them. The use case of having the school set up groups for the | children isn't something we've considered as much, but it seems like something | we should pursue. SJ