This is a qualitative case study framed by a sociosemiotic theoretical framework to explore science and language instruction with three Emergent Bilinguals (EBs) in sixth grade. The study details the modeling and explanatory processes used by EBs to mediate science learning through evidence-based argumentation. A thematic analysis of students'…

This report examines the Spanish language proficiency of fifth-grade students enrolled in the two-way Dual Language (DL) Program. Both native and non-native English speakers' Spanish language proficiency was assessed with the STAMP 4Se assessment in Spring 2020. Students were assessed on four domains of Spanish language proficiency (reading,…

This report documents how 5th grade native English speakers in the two-way dual language program at Austin Independent School District performed on STAMP 4Se, a Spanish-language proficiency test, during the 2017-2018 school year.

This report documents how native English speaking students enrolled in the two-way dual language program at Austin Independent School District (AISD) performed on STAMP 4Se, a Spanish-language proficiency test during the 2016-2017 school year.

The present paper explores and compares the receptive vocabulary sizes of two groups of learners of different native languages. One of the most widely used vocabulary size tests is the Vocabulary Levels Test designed by Nation. Some reservations have been raised in relation to the adequacy of the Vocabulary Levels Test to estimate the vocabulary…

Using data from seven cohorts of language immersion lottery applicants in a large, urban school district, we estimate the causal effects of immersion programs on students' test scores in reading, mathematics, and science and on English learners' (EL) reclassification. We estimate positive intent-to-treat (ITT) effects on reading performance in…

Using data from seven cohorts of language immersion lottery applicants in a large, urban school district, we estimate the causal effects of immersion programs on students' test scores in reading, mathematics, and science, and on English learners' (EL) reclassification. We estimate positive intent-to-treat (ITT) effects on reading performance in…

Bilingual teacher education scholars continue to advocate for the improvement of Spanish language-related teacher preparation practices. However, the field is in need of research on how bilingual teacher educators across the U.S. are addressing this task in their work with future teachers. In responding to this call, I describe an approach and an…

Language immersion students' lexical, syntactic, and pragmatic competencies are well documented, yet their phonological skill has remained relatively unexplored. This study investigates the Spanish vowel productions of a cross-sectional sample of 35 one-way Spanish immersion students. Learner productions were analyzed acoustically and compared to…

This quantitative, causal-comparative study examined the possible cause and effect relationship between educational programming, specifically one-way Spanish immersion and traditional English-only, and native English-speaking fifth graders' vocabulary and reading comprehension. Archival data was used to examine students' reading achievement as…