Christians: How to approach an accuser and still walk in love?

Bullying in school has gotten so out of control and some of the teachers are not helping the situation. I admire your desire to stay calm and do the right thing. Absolutely, go to the school. Support your sister in every way. Remember to pray before you go. Ask God to let your light shine in that darkness so that they can see the love you have. But let them know that you do not and will not condone this bulling of your sister nor any other student there. We have too many young people that have all ready taken their lives because of the bullying and you will not tolerate it. I hope all goes well for you and your sister. God bless you.