The central issue of this volume is how to meet the linguistic and academic needs of the increasing numbers of English learners (ELs). At the center of educational turns is the role of school professionals in this Common Core Standards era. Teacher education programs and professional development, or pre-service and in-service programs for teachers of ELs, are currently being reframed to reflect the new demands placed on all teachers in light of the new standards. The expectation is that ELs can learn, and their teachers possess the expertise to teach, both discipline content and academic English at the same time. The large numbers of ELs across the country have created a wide gap between what teachers have been trained to do and the skills they need to teach and reach them effectively. This practical handbook brings together research, policy and practice on teacher effectiveness, pre-service and in-service programs in the context of student linguistic and cultural diversity. Key features include: Clearly articulated teacher training and professional development programs; Coverage of Common Core curriculum and a variety of instructional programs and practices with research-based tools to implement them; Policies to equitably and effectively prepare ELs academically and linguistically.