If a 6 year old child is showing such disruptive behaviour then address the issue asap, there is some suppressed feeling which is producing anger and hostility in him towards the environment. How is home environment? How is his relation with his parents? How is the school environment and teacher handling him? What is the disciplinary technique practiced at home? He also could be undergoing through anxiety depression which he is not able to express in words. Is he a Hyper active n inattentive in class. All factors needs to rule out.
Next Steps
parents needs to be empowered through counseling about handling child's behaviour and emotions. Do not wait you as parents have to take the charge of the situation, after all he ia a child and needs with of his parents.
Health Tips
speak to him in a considerate manner and not in a blaming or complaining tone.