In a district serving more than 156,000 students, including 30,000 multilingual learners speaking 162 languages, Daniel Yip, Michelle Hunsberger, and Dr. Luciana de Oliveira discuss shifting from a self-contained ELD model to shared responsibility for language development across content classrooms. They explain how a train-the-trainer model and a language-based instructional framework are helping thousands of educators confidently support ML students.