Hi, I have about 5 boys in particular who call out, rock on chairs, are very lazy, refuse to do things etc. The problem I have is they just answer back or say no. This is leading to others copying as they see that the others are 'getting away with it'. I am at my wits end with these few ruining the lessons for the others and spend more time talking to them (negatively and praising when they get it right) that I don't get to talk/work with others without constant interruption. My TA isn't very useful when it comes to behaviour management - they just completely ignore her or answer back. They respond to me but as soon as I have one doing the right thing another one is off task. Doesn't help that some are so lazy they virtually lay across the table and just glare at you if you comment/encourage them to join in. They are year 4/5. Any tips?