I am a substitute teacher - primary trained but due to the lack of work - take some days subbing in a secondary school. This is usually once a week or just less. The school I sub in however has behaviour problems. I would like to know if you have any advice on how to deal with the classes that I have. I am usually left with the classes that have no work left for them and of course they are not going to say what they have been working on. I usually don't know until the morning I come in what subject I will be covering. I did have some tasks that they could do on paper but this 99% of the time ends up with paper airplanes flying all over the room - I need some advice on how to set my authority in the classroom for one day/one lesson at the beginning so at the very least, they are not running around the room hitting each other with pencils and the sort - I need the work as draining as it is and just need a few tips to make it that bit easier.