Communicating with students

You can find information from me on this blog, but I am trying to use this Facebook page too.

https://www.facebook.com/groups/245867378793007/

But I see there are other ones this year. Tell me in class which one you use.

I've asked to join these:

https://www.facebook.com/groups/559166684293775/

https://www.facebook.com/groups/136819743502368/