Firstly we need to observe the behavioural issues in the children and try to understand the problem. Like kids sometimes suffer some disorders like ADHD(Attention deficit hyperactivity disorder) or ODD(Oppositional defiant disorder) or anxiety or depression disorders .If its a medical issue then concerned doctor should be approached.Child psychologist is the right person who could counsel such kids. Regular counselling and assigning them tasks and responsibilities could work miracles.