The "Filière Bilingue" (FiBi) is a Swiss public two-way immersion program integrating French-speaking, German-speaking and allophone learners (having neither French nor German as an L1) in each class. Located in the bilingual city of Biel/ Bienne, the "diglossic" situation represented by the use of Swiss German and standard…

The purpose of this study is to explore the statistical nature of the linguistic interdependence hypothesis (Cummins, 1976, 2017) in the spring of 2nd grade of students in foreign language immersion programs. Specifically, the interdependent relationship between L2 language proficiency levels and L1 reading academic performance in an environment…

The rising demand for dual-language immersion (DLI) programs, which offer core instruction in two languages from early grades onward, has raised questions about program design and access. We leverage the rapid expansion of DLI schools across the U.S. state of Utah to estimate effects of DLI program availability on the academic achievement of…

Purpose: This study examined the frequency of code-switching by Spanish-English-speaking children as a function of language proficiency in each language and diagnosis (developmental language disorder [DLD] or typical language development [TLD]). Method: Sixty-two Spanish-English-speaking children, 5-7 years of age, participated in this study (24…

Purpose: This longitudinal study investigated the trajectory of Spanish article accuracy in Spanish-English dual language learners (DLLs) from preschool to first grade, addressing the need for longitudinal data on the variability of Spanish grammatical skills in DLLs in English immersion classrooms. Method: Language sample analysis was conducted…

Chinese as the medium of instruction (MOI) is used across the curriculum for early childhood education in Hong Kong; however, kindergartens with non-Chinese speaking (NCS) students adopt different MOI, in which English remains an integral part of learning and teaching, to cater to the needs of NCS students and their families. The present study…

Canadian students enrolled in either French-immersion or English-instruction programs were followed from Grades 2 to 3 (M[subscript age] = 7.8 years to 8.9 years; N = 244; 55% girls). In each grade, students completed two mathematical tasks that required oral language processing (i.e., word-problem solving and number transcoding from dictation)…

Using the 2.4-million-word written Spanish subsection of the Corpus of Utah Dual Language Immersion, collected from a large-scale standardized writing assessment of K-12 Spanish second language (L2) students, this study focuses on lexical complexity as operationalized by three measures: lexical diversity, lexical density, and lexical…

This three-article dissertation examined how policy choices in three key policy areas -- initial enrollment, service provision, and reclassification -- impact English learner (EL)-classified students. The first article examined the national landscape of state statutes, regulations, and state education agencies' (SEA) guidance that support…

For many preschoolers in Turkish kindergartens, English instruction starts in the third year of their lives when they have barely begun to articulate their thoughts in their own mother tongue, Turkish. Parents have a dual role as models and decision makers in their children's foreign language education. As the fifteen participant parents of this…

Assessment "as," "for," and "of" learning complement effective curricular and instructional practices, however, the complexities of assessment for multilingual students are too-often overlooked and misunderstood. What if multilingual learners, teachers, and educational leaders all had opportunities to plan for and use…

We focus here on the obstacles students face when learning to read in their second language, specifically in contexts where the second language is taught as a school subject or used as a medium of instruction (immersion). Qualitative studies in these areas have highlighted strategy deployment and approaches to constructing meaning as key variables…

Students learning to read in more than one language, or emerging biliterates, are becoming increasingly common in schools. Early screening and identification of reading difficulties may lead to better outcomes for emerging biliterates as well as monolingual English students. Oral reading fluency (ORF) is one tool shown to be both a reliable…

Prior research has shown that EL classification is consequential for students, however, less is known about how EL classification impacts students' outcomes. In this study, we examine one hypothesized mechanism: teacher perceptions. Using nationally-representative data (ECLS-K:2011), we use coarsened exact matching to estimate the effect of EL…

Previous studies have shown that immersion students tend to speak the majority language during peer interactions, regardless of the language of instruction or their dominant language. Researchers have argued that the societal status of the majority language presents an obstacle to providing equitable support for both languages of instruction. To…