Hi Tara,
I'm on my second year PGCE post 16 and have had to do a few micro teaching sessions. being an interview your going to be nervous, so pick a subject that you can talk about even when flustered, will help you keep calm, if you know your stuff, no one can phase you!!
as you only have ten minutes, pick something really easy and they should be doing the work, how about eg talk a little about africa, and then get them to assemble a lamineted jigsaw of where the right countries should be?? planets in our solar system, get them to put them in order???
The emphasis in PGCE at the moment is making it student centered learning, so you talk as little as possible and let them do all the learning!!
hope it helps and good luck in your interview
