My husband and I recently sent our youngest son (DS2) to a new school, and we have noticed a few behavioural changes since, he has suddenly become very aggressive towards his brother. He has been stealing DS1's stamp collection, and ripped pages out of his notebook. He also threw my husband’s binoculars out of the window. Things begun to get worse when I was contacted by DS2's teacher, saying that she had some concerns about DS2's destructive and disruptive behaviour. I have never experienced this kind of behaviour, I never had to go through this with DS1, any tips would be appreciated for encouraging kind and helpful behaviour in the home and classroom.
- [Post edited to remove names]