Multilingual learners (MLs) are the country's fastest-growing student population: One in five students speak a language other than English at home, and 10 percent of the student population across the country is identified for language development services in school. Despite these students' growing presence nationwide, relatively few best practices and model policies are being scaled to serve them. In fact, MLs often experience a chronic lack of access to four resources essential to meeting college and career readiness standards: high-quality instructional materials aligned with grade-level standards; teachers and systems equipped to deliver strong instruction; educators who hold high expectations; and culturally and linguistically sustaining instruction that supports deep engagement. These systemic inequities result in lower educational outcomes, including, most concerningly, disparities in high school graduation rates, which can derail access to economic and social mobility. This report uses the framework of learning acceleration, a strategy to support students by providing grade-level work and just-in-time supports, to provide school system leaders with templates for supporting MLs in targeted ways.