If you are a girl, it is highly likely that growing up, you played "teacher-teacher" with your friends or maybe even with your dolls and toys. My little niece tries to play teacher with me now, and I happily oblige (as long as there's no homework!).
Back in Delhi, my dad had painted a part of the balcony wall with black paint and got me some colourful chalks and a duster. Many evenings, my friends and I would cram into the small balcony to play. I don't think I ever got the chance to play the teacher since I was the youngest among our neighbourhood friends. Silly power play, I say. :) Since Pia and I lived in the same building, we would hang out in the balcony more often, especially after it would get too dark to play outside.
Somehow I never got the idea that a blackboard can be used for something other than teaching, and since I had to be the student even while playing, it didn't attract me that much. Looking back, I wish I had used the blackboard more often. It would have been a fun place to doodle, or play cross and noughts. Maybe I'll do that now, with my colourful markers and whiteboard that I use to make boring grocery lists. Maybe I'll try to play the teacher this time. I promise I won't give homework! :)