My daughter tells me her best friend is being bullied by another girl in class. I don't want her to become involved in the situation. My father used to tell me to fight back, but I don't think this is the best advice.
Bullying is a serious issue in schools. It can be defined as hurting, scaring or leaving someone out on purpose. You do not say what type of bullying is involved here. While bullying is often painfully obvious, the more subtle and hidden examples of it can be harder to detect. But they can be just as harmful, maybe more so.
Both boys and girls can be bullies. They either act alone or in groups. They hit, shove or kick, call people names and are mean about how others look and act.
Bullies can hurt feelings as well as body parts and malicious gossip can be just as destructive in the playground as at a dinner party.
Although anyone can be bullied, it is often the case that the victims are quiet and timid. Nobody deserves such treatment and schools should have a zero-tolerance policy towards anyone who behaves in this way.
Your first step might be to refer the matter directly to the school and find out what policies are already in place. Most schools have a well-structured set of systems and protocols to deal with all kinds of behavioural issues including this one. It is likely the school will want to and be able to take the lead.