Indigenous-language immersion (ILI) is a form of schooling where all, or nearly all, classroom instruction in every subject area is conducted in an Indigenous language. This dissertation comprises three case study comparisons of neighboring pairs of ILI and English-medium school programs. The first case study examines two elementary schools in the…

This quantitative, causal-comparative ex-post-facto study primarily examined differences in mathematics achievement between Latinx English Learner (EL) fourth-grade students instructed in English and Spanish within one-way dual/developmental additive elementary bilingual language programs but tested in English. Additional analyses examined the…

Administrators and teachers are tasked with the opportunity to implement bilingual programs to accommodate the growing population of multilingual learners, or MLs. There is a debate in the field about the most appropriate structure for bilingual programs. Sheltered Instruction (SI) is a way to "shelter" MLs from the anxiety of regular…

Students' instructional needs are identified, and proper interventions and instructional placement are put in place to maximize student-learning potential, but there is a gap in literature regarding the impact of classroom factors on student achievement of English learner (EL) students in diverse elementary schools (Heritage, Walqui, &…

The purpose of this study was to investigate Spanish-speaking multilingual learner (MLL) students' long-term academic outcomes after participation in an early childhood education (ECE) program with English instruction. The study included 359 Spanish-speaking MLLs who qualified for Free and Reduced Lunch from Grade 1 to Grade 6. Participants…

Language immersion programs are becoming more available as a form of school choice in both private and public education in the United States and beyond. While there is research on the benefits of immersion education regarding overall intelligence, there is still much skepticism as to why parents would place their child in an immersion program vs.…

This study examined the vocabulary development of Spanish-English bilingual adolescents (n=98) from the end of 6th through the end of 7th grade in a dual language setting by looking at the patterns of growth in English and Spanish vocabulary post intervention and adding to the body of research on vocabulary development. Data were analyzed using…