Just my opinion but when you are at home the parent has an easier time to focus on the child. At school a teacher cannot give that same attention.i have no doubt from all the posts that he does not have the appropriate challenge at school. That said it still doesn't excuse bad behavior at school.
No one wants him to behave badly at school. But the OP thinks the behavoir is a symptom and treating the cause is more effective long term than treating the symptom. Also with a strong willed kids threats don't work, the just make things worse as they simply don't care at that point. A parent may know when it will work but a teacher won't.
