My DS (currently 18) has had a rough experience with school, teachers are always saying he is lacking focus and both they and I can see he has a bad study attitude, we are currently halfway through year 12 so time is limited with exams right around the corner. Even during parent’s evening this is a thing, he says it is sudden stress and the trouble of keeping on top, but I feel it is that bloody phone. This morning I got an email from his math teacher, his class apparently has a collaboration project where they pick questions from old exam papers and compile to make some study guide. My son has not done his part, this is not the first time this has occured, the teacher is at a loss and I am at a loss. He tried to get me to “sit down and listen to” “his side” which I refuse as there is no excuse behind any of this besides a bad study attitude, not any of the “mental stresses” he claims to be facing and this crap of “spend time with people you love to ease stresses”, or his “efforts to improve” which is probably just words that will never happen. Now normally I do not mind him doing what he wants in his free time, but now that this email came through, I have told him no going out, I don’t care if he “is missing out” or if “this is his only time to do it” (as he has been sheltered quite until he made a turnaround near the age of 18) no, we live in a secured community which requires granted access codes to exit or enter, I told him, if he wants to go anywhere he won’t, he lives under my roof, he stepped out of line with this poor study attitude, so therefore I won’t grant him access to exit as I won’t be letting him go out, and he can barter with the security and explain his wrongdoings. He is furious at me, says he will not tolerate my “shithole of a punishment that is for little kids” and that I should “help without this nonsense” and I feel like I might go insane. AIBU for this punishment? What do I do?