I bend over backwards to make him care about school. He's been on Adderall for two years. He's just such a lazy student, ex. when he's supposed to be studying I'll catch him asleep in his room or hiding a cell phone or iPad mini on front of a book. He's too old for "everyone did bad on that" twice a week.
He sounds similar to my sopohomore ADHD DS - he only likes math and music, he does minimal effort on homework and no studying (although his grades are As and a few Bs in subjects he hates like French). We just have him schedule his classes according to the amount of work he is realistically willing to put into it. So he takes honors math & science and might take some AP in those subjects, but he's doing just 3 years of language and will likely stick with regular level English throughout high school.
I find that things are actually worse if I try to make him do his HW at a certain time or place. The school day was PLENTY of structure for him. So I don't care if he wants to take a nap before he practices and does his work, but I expect it to be done if it's something that has to be turned in or a test that he actually needs to study for.