Currently the teacher comments don't appear on the platform any differently than the student comments. When there's a long discussion between the teacher and the class, there's nothing eye catching to make you notice which bits are written by your teacher. 

Our suggestion is to add a coloured border to the facilitator comments and posts. That slight change of colour is just enough to catch the eye and make it obvious that the teacher has posted and you quite likely want to be reading that post.

I've included an image mock-up showing the coloured border plus the same image without the border so you can see the difference just that small change makes.