DS is 6 and in year 1. Behaves impeccably in school, has extra support via his ehcp for his speech, listening and attention but really well behaved.
His behaviour at home is absolutely hideous. Swearing, hitting, constant screaming. Collected DD from her door on the way out of school and DS shoved a reception child flying.
I know full well DS wouldn't dare behave like this at school, so he very clearly can behave. So I've really pushed being even firmer with him as I can see he clearly can behave so it must be my parenting that is the issue. I don't have an issue accepting that but it just isn't working. For shoving the child earlier I made him hold my hands whilst I finished talking to DS's teacher. Then informed him for xx he was losing his after school tablet time. He then predictably kicked off re the loss of tablet time so once we were home I sent him to his room until he had calmed down. Dinner was 4pm and we spent 20 minutes after building some lego together as a bit of a chance to have a positive moment. It is now 5pm and he is running around incredibly boisterous again.
It is just constant and I am drained. His understanding isn't 100% so I approach him as a more recently turned 5.
How do you get even firmer to show that if they wouldn't do it at school, it also won't be tolerated at home? AIBU to know he can behave and to expect it here too?