Address Prejudicial Language
If you hear your child label someone or make a prejudiced remark, address it right away. Ask, "What do you think your words mean?" She may think saying something like "that's gay" when she means "that's stupid" is harmless because her intention isn't to put down the gay community, so help her understand why it's not okay. Have her do an empathy exercise and articulate how the offending comment might make others feel. Listen to see if she's using that kind of language to hide a deeper fear.