If the school has information that a bullying situation is going on and they do not do anything about it, it is in your total right to get the authorities involved. So you should consider that option, if possible regarding where you're from.
I have thought about that, I'm just worried it might get worse. The girls that do this do it in a sneaky way. They act all nice and sweet when adults are around but then gang up when they are at recess.
The sixth pentacle of Mars sigil would be perfect for people that bully others. All you need to do is wait to Tuesday and charge the sigil with the correspondence and then put it in your pocket. Their other pentacles of protection but I like Mars better because of the harm going back to the sender.
As a fellow chaote I really don't rely on moon phases just my intent if I want something done instead of waiting a month for a moon phase.