I have just finished my 1st half term as an NQT. I think you have it slighted harder because pupils expect new teachers in September but not so much in November. Be firm and fair and stick with it. I am still having problems with some of my classes, I would be lying if I said otherwise, but it feels likes it's getting slightly easier. I now just seem to have a few hard core problems, but I am beginning to realise that these few individuals are problems in other classrooms too. I was warned that pupils try it on with new teachers - they do (I did as a teenager too!). Just stick with it, firm and consistant every time, it does start to get easier as you get to know them.