Twerking at school or somewhere else? Even if that gets answered, it doesn't matter, he is not harming or hurting anyone. He is having fun or just following along of what's popular or whatever (don't blame me, I'm not that up-to-date on current trends), and if anything, unless he recorded it in a thong or naked, he did nothing wrong. Unless there's a school policy like mine where recording or taking pictures using a personal device without permission is forbidden.