In spite of decades of school reform, the achievement gap between English learners and English-proficient students has narrowed little. This book introduces the "Sustainability Framework"--a step-by-step process that will help educators at all levels increase school attendance and academic success for ELL students. This reform-navigation tool identifies patterns and trends in the deployment of a reform and subsequently allows leaders to make necessary adjustments to extend, accelerate, or terminate a given reform. Bridging the English Learner Achievement Gap offers a compelling, research-grounded way for schools with a substantial ELL population to successfully accommodate their students.