Students teaching students

I have an extremely talented student in my Adv. class.  The majority of my students are in awe of this young man's work, especially his pen and colored pencil drawings. 
I decided to let him give a demo to my Art 2 students and Adv. students one day last week.  He was extremely nervous at first, but once he got into the swing of things he did a great job.  The classes were very attentive to what he had to show and they are now applying what they learned to their own projects.
I hope to bring in former students into my classroom to give demos to my students.  I believe my former students are a great resource and my students will enjoy learning from them.
I will post the picture of the piece he was doing for the demo soon.