How can I prove in one week that I absolutely want to stay in school if it only depends on one subject?

Hello,

The report cards are coming up, and the grading conference, as well as the deadline for grades, is next Tuesday. My math teacher has decided to give me a grade of five because she doesn't think I'll be able to move up to the next grade. I'm in middle school and am going into tenth grade. This single five on my report card will mean I'll have to repeat a year or change schools. Can I prove my math teacher wrong in a week and improve so I don't repeat a year and still get a grade of four? My very first test was a five, and my second a four. My oral exam grade is a four.

I really need help and feedback!! I would be very grateful.