Are schools legally allowed to keep pictures of you up on the school website/pages?

there is a horrible picture of me on my school's instagram page. I really want to ask them to take it down but im scared that they will say ''no you look fine'' and just forget about it. are they legally allowed to keep the picture up? Im pretty sure my mum signed something that says they can... show more there is a horrible picture of me on my school's instagram page. I really want to ask them to take it down but im scared that they will say ''no you look fine'' and just forget about it. are they legally allowed to keep the picture up? Im pretty sure my mum signed something that says they can take/post pictures of me but if I ask them are they allowed to keep it up?
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