Bullying Support Group
Bullying is the act of intentionally causing harm to others, through verbal harassment, physical assault, or other more subtle methods of coercion such as manipulation. Bullying can be defined in many different ways, but one thing is clear: no one deserves to be bullied. If you or someone you know is coping with bullying, this is the place to share your feelings and get...

Do you have other friends? People who support you at school?
Why does your mother think beating her up is the solution? I think it is best for your mother to speak to the school's counselor and ask for advice.
Stay strong and don't react to her provocations the way she wants you to.