Seriously, I tried, it was all boys, all 15 and 16 years old, I was casual relief so I just wrote it up for their regular teacher that I tried but after 15 mins of innapropiate comments and unrully behaviour I gave up. See that was all I could pretty much do, being a casual relief I couldn't really follow up discipline that much myself, just keep tabs on what had gone on. David was amused and just said that he thought that class might have been an interesting challenge for me.