It's not a book on how to teach Indigenous content but rather how to decolonize the way you teach. It could include a chapter or two about decolonizing the school structure too; e.g., not just classroom techniques but maybe also our sense of time in schools and so on. Ontario has just made Indigenous education mandatory for graduation, and 95% of the people teaching Indigenous content in Canadian schools are non-Indigenous, so she's going to add a chapter about how to do that effectively too.