For this exercise, set up a portrait session in which the face is prominent and over the course of shooting direct your subject to look towards you and away.
Keep the communication between you and the subject through conversation and gesture.
For this exercise there were a few of us taking images and taking it in turns to be the model and the subject. Diane was sat on the floor of a greenhouse which gave a really nice background and light. It was easy to direct her to look at me and then look away as we were very conversational and we’d been out taking photographs earlier in the day so were quite relaxed at this point. I think the benefit of spending time with the subject gives a more relaxed portrait.