Teacher presence is critical to any healthy online conversation. Think about the things that you need to do in a face 2 face classroom and imagine what that’s going to look like online. Set a tone that people understand. Make clear what your expectations are. Don’t think of posts online as a discussion with you, but rather a discussion between students that you will occasionally jump into – just like if you were in a classroom and students were having discussions. Always, always be there to jump in and be a mediator if someone is being inappropriate.