Can you do a report card type thing. Where he has targets like "I will speak in a polite tone to adults." and "I will speak only at the correct times in class." He carries it around to all lessons and staff tick if he meets it or not. If he gets a certain number of ticks he gets a reward of some nature. If he doesn't get a certain minimum then he gets some kind of sanction. If you ask almost any teenager if they 'feel listened to' they will almost certainly say no. He may want attention, don't we all, but at the end of the day he needs to learn to get it in an appropriate way. He is in year 10 and has probably had all sorts of interventions since year 7 at least. Until he sees that he has the problem, not all those mean and nasty teachers who pick on him, then he cannot change and it is unfair to ask him to. Praise him to the hilt and reward for every single lesson where he does the right thing.It has to be worth his while to get it right. Also keep on feeding to him, drip by drip, the message that it is his fault and his responsibility to change.