Are directly tied to his behavior. And likely at home or with the grandma he has been given less rules or structure, especially with the divorce of his parents, well meaning as they think it will help him to be kinder or easier on him, yet it has the opposite affect and actually leads to more anxiety and issues with kids.

The best advice I got going through my divorce with my kids was don’t stop providing a structured home environment. Don’t let the rules slide because your kids now are going though this as well. Kids crave consistency and structure . They don’t need a dictator, but they need clear rules and consistent home.

I bet he is allowed to watch a lot of tv or play on a tablet or video game or eat whatever and whenever he wants. Or there is something at home that seems easier for his mom and grandma yet at school he is good because he loves the structure. Kids that are like this at home but fine at school I would bet this is 99% of the time the case. If he was a troubled kid at school and home I would say it isn’t something she is too relaxed on at home, but it has to be something going on at home and it could be as simple as bedtime or dinner time, or too much free time at home and not enough structure.