What are her feelings about math? (Does she typically love it, or is she all-around smart?)

What does she say when you tell her this will affect future track and placement if she goes down a track?

What are her feelings about being a "smart girl"?

Concerns about being "nerdy"?

Is this class largely boys?

What are the consequences for a poor grade in 7th grade? Does it matter?

Would she be willing to commit to nightly homework/comprehension checks with you?

I feel for you as we have experienced some somewhat similar issues, and still are.