Is it possible you may be getting F’s for these reasons:

The work is late and you have a “no late work” policy at school.

The work you turn in is substandard. It’s not worth anything BUT an F.

You have plagiarized the work or cheated in some other manner, so gotten a zero.

If it’s a test, you didn’t study so you got most of the answers wrong?

As to the teacher “ignoring” you. How do you interact with her?

Are you polite?

Are you disruptive in class?

Do you back talk her?

If any of these questions sound like you, then your “F’s” and her “ignoring” you are totally understandable. You need to change both your work ethic and attitude.

However, if you truly feel you are a good student with a good attitude, make an appointment to see her with your parents and discover the reasons for the bad grades.

Teachers are more likely to work with you and explain things to you if they feel like you are actually trying. If you answered no to any of the above questions I would seriously suggest that you sit down and reevaluate your own study habits and participation before you dog the teacher. If you have been truly trying and she just doesn’t like you try talking to her again after class and explain the issues you are having. If this doesn’t resolve anything then go and talk to the principal and present your case to him/her.