I can't help but think our DD10 sounds just like your daughter. She deliberately flunked out of her AoPS class! She was mad that she had extra homework her friends did not. I will say that she is working on AoPS now because she and her friend decided to get together once a week for a math class with this friend's mom. It was all about having a friend do it with her that made it (somewhat) fun. Now she and I work on the problems side by side. She gets pretend peeved when I get the answer first (I haven't done this kind of math in years so I am enjoying it as well!!).