I’m honestly surprised to see so many responses in this thread that diverge so wildly from my own. It was inappropriate for this instructor to join the chat an

I’m honestly surprised to see so many responses in this thread that diverge so wildly from my own. It was inappropriate for this instructor to join the chat and silently surveil their students. When they saw the students exchanging information like that the first time after forgetting about it, they should have posted a warning on the thread and left. Some of the energy of analyzing their students cheating would have been better spent looking at how to make the assessment of learning more resistant to a student sharing a screenshot of a question.