A Little Princess by Frances Hodgson Burnett
Alone in a new country, wealthy Sara Crewe tries to make friends at boarding school and settle in.
But when she learns that she'll never see her beloved father again, her life is turned upside down. Transformed from princess to pauper, she must swap dancing lessons and luxury for drudgery and a room in the attic. Will she find that kindness and generosity are all the riches she truly needs?