reading this ... boredom comes to mind. Is she at all interested in the classes she's taking? Also ... form my own experience ... lower grades may be a "defense system" for her. I was always stressing over getting straight As when I was in elementary and middle school. Getting a C ONCE was the end of the world for me! In high school I one day figured told myself that the world does NOT end with getting grades other than As and let myself miss questions, didn't stress over every little test ... I realized that NOT having As all the time made me happier when I DID in fact get them and people's expectations around me were lower so I actually got praised for good grades rather than my parents and everyone else saying "what else is new?" when I kept straight As all the time. ... I hope this makes sense? Not sure if that applies in your daughter's case but it might be something to consider?