Where the Spirit Lives (1990)

In 1937, a young First Nations girl named Ashtecome is kidnapped along with several other children from a village as part of a deliberate Canadian policy to force First Nations children to abandon their culture in order to be assimilated into white Canadian/British society. Taken to a boarding school where she's forced to adopt Western Euro-centric ways and learn English, often under brutal treatment, she has the support of one sympathetic white teacher.