My children are being bashed for there coloer at school and they come home in tears what can i do?

I live in a town that is predominately mexican people some are very nice some can be down right hateful. I can take it im an adult but my children go to school of pr ox fore hundred children i have taught my children to be kind to all people no matter race our looks and i told them they will be treated the same but that is not true my children are be bulled every day for being white and because of the way i razed them they don't know how to take what is going on its makes me sad to see this and even the parent nights for the bord are in spanish so if i try to defend my child it is a lost case. I know my history and i have seen my share of how African Americans were treated and still today it is happing but in the fiftys more so well now it is happing to my children and i dont know what to do please help .They cant take much more and i have taught them not to hate God mad use all the same.