Tell a sympathetic teacher, pick your teacher and go with one who you know will care and be bothered, not necessarily the one whose actual job it is to care and be bothered. Tell them everything, especially address who and how she gets beaten at school every day, that might be the be all and end all of it, there might be nothing else amiss, so hep her to get that sorted and then hopefully the teacher will be on side to investigate anything else further and take appropriate action. x