Fun Idea for Posting Instructor Photo in Online Course

A couple of weeks ago I mentioned the importance of instructors putting their photos in their online course. Now it's probably better to have it up there in the beginning of the course, but here's a neat idea that I've done before if you want to wait a couple of weeks into the course. Post four pictures - one of yourself and three of other people who look quite different from you. Let students guess, based on what they've gleaned from your interactions, which one is the real you. In my experience, only about 15 percent picked the real me, and it was a bit of a fun time for all. Fun is always good.