No advice, but you are not alone. Following this thread. YS DD11 is definitely "smart, but scattered," with no ADHD diagnosis, but with what would appear to be some EF challenges. It is difficult to sort out what is lack of engagement, boredom, actual EF challenges, laziness, or something else.

When we try to ask her about assignments that are missing, we usually do not get a straight answer. It is VERY frustrating.

Right now, we check in with her often and remind her of what may be due. She hates this, as she is VERY independent. BUT, she has not yet demonstrated the ability to stay on top of it all on her own. So we will probably continue to encounter eye rolls for the foreseeable future...