I run a nurture class in a primary school. I have had difficult and challenging children in the past and have managed to modify and improve their behaviour. However I have an eight year old boy who has been with me for 2 terms and he has not responded to any of the many, many strategies I have used. He is extremely violent, kicking,biting,punching, spitting,throwing objects including chairs. He is also verbally aggressive. He can also be charming , especially with new adults. He has a constant need to control every situation and the violence occurs when he cannot. The violence is always calculated. He has rarely really lost his temper. Our latest strategy, which has started this week, is to keep him in one small area of the class where he can work and have free time. He is told (in a very caring way) that he cannot join the rest of the class untill he can behaviour politely ie. no violence and no swearing. He has to be restrained a number of times a day because of his violent outbursts but I feel that there is a slight improvement in that he is compiling more often and more quickly. I have come to the conclusion that he needs very,very firm boundaries which cannot be relaxed until there is significant improvement. I believe the previous strategies haven't worked because they are all based on being fair and reasonable with a child who sees such behaviour as open for manipulation and control. There is input from outside agencies but the bottom line is there is nowhere else or nobody else who can take him on.we are his last chance. I suspect he may have an attachment disorder. I suppose my question really is are we on the right lines by having what is basically a zero tolerance approach, all be it with a caring and nurturing ethos? I'm really asking can my class make a difference and improve his behaviour, has it been done with children who have such extreme behaviours ? I would be very happy to have your views.