I'm trying to educate my little girl in standing up for herself. The thing is she is kind and considerate, even to bullies. She's doing judo now and when she's 7 she wants to do kids-Krav Maga. I hope that helps her understand she is not powerless. (Krav Maga for kids is also about understanding bullies and situations).
Please do not mistake kind and considerate for powerless. One of my favorite stories is of a woman who decided to walk out on a class about "empowerment" rather than learn to yell at people. One of the other students said "God, what a bitch" as she quietly left rather than take her turn dutifully berating people.
True words and good example. It took courage to step up and walk out of the group.
I'm trying to communicate to her she is definitely not powerless. I used the example of a cat: Not very big or as powerful as a dog, but you still wouldn't pick it up and mess with it. She doesn't have to be as strong as the bullies, as long as they know she won't tolerate any (physical) abuse.
My oldest didn't suffer unduly at school, but was beat up for a time, unbeknownst to me, by his younger brother. When I found out, he told me he did not defend himself because he knew he would get in trouble. I told him I had never and would never hurt him the way his brother had and he needed to defend himself even if he was grounded for it, that not defending himself was worse than anything I would ever do to him.
Teach your daughter she does not need your approval. Teach her to make her own decisions, even if sometimes other people don't like it. Help her figure out how to make good judgement calls in the face of difficult circumstances. Give her opportunities to make real choices and back them even if you do not like them. Let her know you don't like all of her choices but you accept them and respect her right to make them. Do not make her dependent on being liked and approved for everything she does.