I have an 11 year-old 6th grader who at the beginning of the year was getting straight A's. Now I'm finding that she does not turn in some of her homework in a couple of classes which has earned her an F on some assignments. When she does turn in her work, she gets A's on them so it's not that she doesn't understand it. We've grounded her from FB, taken away her phone and iPod so she's on restriction until she gets her grades up. I am now checking her work nightly against the calendar that the school posts for assignments to ensure she's completing them. Anyone else have a child that does that? I can't imagine it's because she doesn't feel challenged because two of her classes are advanced science and math. An old friend of mine's son used to do the same thing and he was diagnosed with ADHD or ADD, I don't remember which one. I'm not going to assume that is what my daughter has. I just don't know what to do to motivate her. We tried offering an incentive for good report cards. If someone else has had this problem, I'd love to hear any advice you may have!