I have a problem student with ADHD and OCD and he is making my job absolutely miserable. I dread going into work on days I see him. No matter what I do, I can never get him to focus. He's a very bright young man and tested two grade levels above his current grade, so he gets bored very easily. He fidgets, interrupts, talks back, ignores me, throws things (not violently), bothers other students trying to work... etc... I know he has a bad home life. He lives with grandparents and only sees his immediate family every once in a while. I'm not sure of the circumstances behind that. His grandparents opted him out of common core, so no state exams for him this year. He refuses to do anything related to common core... even a worksheet. I got him to attempt a problem once by calling it a "challenge problem," but he gave up after a few minutes (not because it's difficult, but because it's common core). I'm at my wit's end. To put it simply, he's obnoxious, annoying, takes my attention away from other students, puts in zero effort, and still demands that I cater to his every whim. If I ignore him or tell him to "get back to work," he just sits there and does nothing until I acknowledge him. He'll ask questions about problems that he VERY CLEARLY knows how to do. He talks to other students while he's ignoring his own work and distracts them. Luckily nobody really buys into it and they just focus on themselves. I really don't know what to do. I need a way to get him to sit down, be quiet, and do the work I assign. It seems impossible.