He should understand that others have needs too. His teacher needs to see his homework done.
Whenever you get a chance, point out to him the hardship that others might be experiencing, "That Amazon delivery man has to work on Sundays in this weather to put food on the table for his kids."
He seem to have contempt toward people around him. Ask him: Who looked down on you?
Remind him: Your mom is not your enemy. Don't distract yourself by targeting me. You need to learn how to deal with people outside who will not treat you as nicely as your mom does. You'll be out there on your own very soon. Start with your teacher by finishing his homework, because that's what your boss will demand when you get a job.
