Schools in the Internationals Network for Public Schools (Internationals) are public middle schools, high schools, and academies (i.e., schools within schools) that serve secondary English language learners (ELLs)--in particular, ELLs who have been enrolled in U.S. schools for fewer than 4 years and who are at the lowest levels of English proficiency. With funding from a 5-year Investing in Innovation (i3) development grant from the U.S. Department of Education's Office of Innovation and Improvement, Internationals received an opportunity to implement key components of its model in comprehensive high schools that serve both ELLs and non-ELLs. Internationals designed an intervention--Project RISE (Realizing Instructional Supports for English Language Learners)--that aimed to improve the educational outcomes of ELLs in Grades 9-12 in two schools by changing teachers' instructional practices and several key structures in which students and teachers are organized. The American Institutes for Research (AIR), an external evaluator of Project RISE, was charged with providing both a formative evaluation and an impact evaluation. The purpose of this document is to summarize the findings of formative and impact evaluations of Project RISE. First, the report presents the results of the formative evaluation accumulated during the 4-year evaluation period while the project was being implemented. Then the report presents the results of the impact evaluation conducted after Project RISE was completed.