[Callers] Workshop activities for helping dancers improve their skills?

Hi fellow contra callers :) I am wondering if any of you have little activities/exercises that you use to help dancers improve their knowledge/skills of contra dance? I know there's lots of opinions on whether this is even necessary or should be offered. However, I have a few situations where I've got dancers who are keen to improve their skills and I'd like to have various fun ways of doing so. I'd love to hear your ideas! One activity I remember from mannnnny years ago in Ottawa was led by Adina Gordon. She had us form up in contra lines and then she would say 1-2 (maybe 3?) figures. We weren't to dance the figure... instead, simply go to the spot where we would end up after the figure(s). I remember this as being a lot of fun and a great learning experience. I also remember from that same session something about sending some dancers out of the room and teaching the dance to others and then doing the dance. (I don't remember the details.) Thoughts? Any advice/ideas would be greatly appreciated. Thanks! Emily in Ottawa ON