This book traces raciolinguistic ideologies in England's schools, focusing on post- 2010 policy reforms which frame the language practices of low-income, racialised speakers as limited and deficient. Across interviews, policy mechanisms and classroom observations, the author shows how raciolinguistic ideologies are rooted in British colonial logics which continue to shape contemporary education policy. He shows how these policies require marginalised speakers to modify their speech patterns in line with normative standards of whiteness under new guises of social justice and research robustness. Finally, new visions for language education and linguistic justice are offered, demonstrating how teachers can see themselves as language activists to identify, resist and reject faults in a hostile and oppressive policy architecture. This book draws on fields including critical language policy, educational sociolinguistics, genealogy, raciolinguistics and critical language awareness.