It's like banging my head off a wall.
We've tried discussion. Shouting. Punishment. Reward. Backing off.
He's only doing what they all do and going through puberty and exams. Is there a book, an online course, a parenting class aimed at parenting teens? We've sailed through every other stage, the problem is most likely something I can change - how we communicate, motivate and interact.
All suggestions welcome.