We can collaborate together to build a lesson together, teach the same lesson in our classes, observe (with tech) the lesson being taught, and critique the lesson in order to make it better. This is the basis for lesson study.
"I just started it, so I will be late to the discussion. (Go on without me as I will be incommunicado for a couple of weeks anyways). We use the book as a discussion piece in a philosophy class at our school (I do not teach that class), because…"