The Center for Applied Linguistics (CAL) was involved in a comprehensive project funded by the Great Lakes Comprehensive Center (GLCC) in partnership first with Learning Point Associates and subsequently with the American Institutes for Research. CAL worked to build the capacity of educators in Michigan and Ohio to deliver effective and engaging instruction to linguistically and culturally diverse students. Content topics included the Sheltered Instruction Observation Protocol (SIOP) Model, CAL’s What’s Different about Teaching Reading to Students Learning English program and Multi-Tiered Systems of Response and English Learners. The project format included a range of professional development (PD) services including technical assistance, face-to-face sessions for teachers, a foundational and advanced-level Training of Trainers for facilitators and coaches, co-facilitation opportunities, materials and resources, online courses, webinars, conference presentations and a joint publication. The project culminated with work with Ohio’s instructional coaches and reading specialists, facilitating their collaboration, fostering professional idea sharing, and building their capacity to serve English learners and their teachers.