Using input and outcome data from a randomized study of dual-language immersion programs in an urban district, we examine the mediating relationships of dosage, expenditures, and classroom characteristics to students' academic performance, and the moderating role of students' race/ethnicity. Differential costs of immersion were concentrated at the…

Across the United States, students who are deemed not to be proficient in English are classified as English learners (ELs). This classification entitles students to specialized services but may also result in stigmatization and barriers to educational opportunity. This article uses a regression discontinuity design to estimate the effect of EL…

This article investigates the differences in academic achievement trajectories from elementary through middle school among English Learner (EL) students in four different instructional programs: English Immersion (EI), Transitional Bilingual (TB), Developmental Bilingual (DB), and Dual Immersion (DI). Comparing students with the same parental…

To illustrate the point that incremental policy changes are important results of program evaluation, the author investigated the influence of evaluation on federal education policymaking as seen in the 1978 reauthorization of the Bilingual Education Act. (LC)

Data collected at three schools in California with programs for students of limited English proficiency (LEP) suggests that exit rates should not be the focus of evaluations of LEP programs and that schools cannot adequately answer questions about students' academic achievement and English language acquisition by program type. (SLD)

A structured immersion program, coupled with an effective curriculum and empirically validated teaching procedure, was offered to elementary Asian students entering a California school. This approach appeared to have significantly better results, and its effects were maintained for up to two years after completion. (LMO)

This article presents findings from a 4-year study of 13 culturally and linguistically diverse elementary schools implementing comprehensive school reform (CSR) models. The study focused on: (a) the actions at the state and district levels that facilitated or inhibited reform implementation; (b) the adaptability of the various reforms in…