I am working with one of my high school aged clients on producing comments to show that he is actively listening. I am going to first have him identify whether what I said is something that requires a positive, negative, or neutral response. Then, he can choose any comment on this list to reply before I continue my story. As he gets better, I will pause the story and wait for him to produce a comment on his own.
Any other common social comments that I should add to the list?