Dual-language immersion programs--in which students learn core subjects (language arts, math, science, and social studies) in both English and a "partner" language--have been gaining in popularity across the United States. Such programs may use a "two-way model," in which roughly half the students are native speakers of the…

Many educators and policy makers look to two-way dual language immersion as one of the most promising options to close achievement gaps for English learners. However, the programs' effectiveness depends on the quality of their implementation. This article reports on a large-scale study of the implementation of dual language immersion across a…

Many educators and policymakers look to two-way dual language immersion as one of the most promising options to close achievement gaps for English learners. However, the programs' effectiveness depends on the quality of their implementation. This article reports on a large-scale study of the implementation of dual language immersion across a…