Anyone else on supply ever been given this as an instruction? Are teachers having a laugh or what? It's hard to achieve with a good class. Bloody impossible with most classes! Especially when the one bit of paper with everyone's name on it has gone back to the office and you are their with 30 teenagers you don't know from Adam. Reasonably quiet, so that the ones who want to get on with the poxy and uninspiring worksheet they've been given are not disrupted too much. That is about the best you can hope for. Otherwise you're on a hiding to nowhere!