Previous studies about ELs have reported data on active English Learners--defined as those students who have not yet reached proficiency on a state English test--at a specific moment in time. This study, for the first time, analyzed the long-term trajectories of 18,000 CPS students who began kindergarten as ELs and followed their progress all the…

The effects of "transitional-bilingual" and "dual-language" educational models on proficiency in students' home language (Spanish) were examined in a study of English language learners in the first and second grades in a large urban elementary school. In each grade, students were taught with either a transitional-bilingual…

Research has demonstrated that students in dual-language immersion programs perform as well as, or better than, their peers in core academic content areas by late elementary school. The extent to which immersion education fosters bilingualism, however, has received less attention in the literature. Using data from a four-year efficacy study of…

This study examined the effectiveness of a transitional Spanish-English bilingual program, Academic Language Acquisition (ALA), in enhancing K-5 students' English-language proficiency, as well as their English performance in academic subject areas, in comparison with the Structured English Immersion (SEI) process. An existing reading program,…

This study investigated the effects of two types of bilingual programs (two-way and transitional) on the academic performance and attitudes of fifth-grade students who entered kindergarten or first grade with different levels of English proficiency. A mixed methods design with both quantitative and qualitative data collection and analyses phases…