Hi, I am an NQT also but in search of a job so I am probably not the most experienced person to deal with this issue. However, I have worked with a really difficult Year 5 class who were aggressive, intimidating and all be it alot bigger than myself and I felt as is I couldn't handle it at all. I actually spent a lot of time talking to the children about behaviour and what they find acceptable within the class and the school and what kind of behaviours they do not think is right. To do this I gave each table a large piece of paper and a pen and got them each to create a class rules list which was then put together as the 'Class Rules'. On top of this discuss alternate reward systems - a sports afternoon, a film, free choice or art afternoon - something they really like doing. You could track this through marble collecting or a whole class sticker chart. I'd try and implement further positive strategies such as raffle tickets for prizes or rewards for those who display great behaviour. Maybe a zero tolernance out look on extreme behaviour such as pretending to kick you - no play, or loss of rewards straight away. Set your high expectations each day based upon the class rules put together. As you are getting to know your class maybe get some team games in there - there might be problems with friendships, self esteem and confidence within the class so build those up through fun games and activities. Hope some of this might - just a though! Also, have you spoken to their current or previous teacher about the behaviour and how they managed it? Or someone who is familiar with the class as you have said the children have had a lot of teachers.