quicko: head boy/girl

I thought Head Boys and Girls were found, well, pretty much in Harry Potter.  I had no idea they were real-world figures until I recently was chatting to a headmaster (headmasters too!) and he was telling me about the selection process for these roles.  I asked what their duties were and evidently one of the major ones is having lunch with the headmaster once a week.  I think I'd have been perfect for the role aroundabout eleven years ago!