Here is a CBC piece on the 'We're a culture, not a costume' campaign. You can ask students to think about how costumes can dehumanize people (for younger grades ask how they make people seem like they are not human). In terms of Indigenous peoples, students can think about how 'Indian' costumes influence understandings of and responses to Indigenous peoples in Canada including treaty, land and human rights. Native Appropriations recently posted on this as well and included pictures of costumes, or check out the blog my culture is not a trend.
