Embedding interaction type activity
Generally speaking, I agree with your suggestion to include a p2p interaction element with activities. However I was thinking that the overview page just provides the big picture for the unit. The intro page seems more appropriate for an activity, and in fact there is one included on that page in this unit.
Also, there are many Q&A questions available in the original material. All of the questions I've looked at are short answer. We talked about adding them to the content. I've not gotten time to add them yet, but before doing so, we should really consider how much "interaction" we want to include....I think there is a point which would be too much.