This volume explores how educators conceptualized and implemented critical approaches to systemic functional linguistics that support bilingual students in appropriating and challenging dominant knowledge domains in K-16 contexts. The researchers exhibit a shared commitment to enacting a culturally sustaining SFL praxis that validates multilingual meaning making, pushes against social inequity, and fosters creative re-mixing of available semiotic resources. It should prove a valuable resource for students, teachers and researchers interested in applied linguistics, education and critical theory.