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After decades of experimentation with teaching language minority students, we are still confronted with an achievement gap between these students and their White Anglcounterparts that refuses tclose This gap widens, as students get older This book is designed thelp leadership teams at the school, district, and state levels tdevelop, implement and evaluate effective programmes for ELLs and all other students Grounded in the authors extensive research on professional development and effective ELL instruction, the authors describe how professional development programmes integrate language, literacy, and subject matter for better results