I was bullied nonstop as a child, the bullying stopped when I fought back, my father told me I needed to whip one of their asses, the biggest would be best, catch him by himself and just whale the tar out of him. If you whip him, the rest will never mess with you, I didn't have an opportunity to catch him by himself, but I figured I would get a good lick in anyway, knocked him down and the other two ran as soon as his butt hit the ground. Bully problem solved. If you have talked to the school administration, and she is still getting bullied, violence should be met with violence.