We love using Slack for our communications here, and I think the idea of using Slack for classroom communication is sound. Some might say it’s not open enough, but I say pshaw, some conversations are better behind closed doors. Not every statement has to be a public stand. Twitter has been a seminar in that last point over the past couple years.
No, my problem with Slack is that it is all hose and no bucket. You can search through conversations and find meaningful facts, but for us, at least, conversation is so easy that it can (and does) erode the impulse to do more end-to-end treatments of things. Community knowledge accretes but never quite pools.
I did a video on Federated Wiki Information Lifecycle a while back that was pretty FW-centric which explained how communication could move to more comprehensive exposition. But there’s a general opportunity here for someone to build a Slack-like tool that pushes users to do the harder iterative work of summary and explanation. And I expect that’s what the next iteration of Slack-like sites will be — communication sites that move fluidly and cleanly into exposition, summary, and more wiki-like modes.
FWIW, here’s the old Federated Wiki Lifecycle Video: