This three-manuscript dissertation attempts to answer the question: "How does students' English language proficiency (ELP) inform the availability, structure, and use of English language accommodations and intervention to support the academic achievement of English learner (EL) students?" The question is addressed using three independent…

English learners (ELs) are a growing demographic in schools nationwide. ELs are expected to demonstrate proficiency in core subjects like their non-EL counterparts. However, an achievement gap exists. To address the achievement disparity for ELs, schools seek certified ESOL (English to Speakers of Other Languages) teachers to provide the support…

Determining the effectiveness of core mathematics curricula is foundational to evidence-based practice. Examining effectiveness heterogeneity is also crucial to better understanding mathematics achievement among English language learners (ELLs). In this study, we used a quasi-experimental design (difference-in-differences) to examine the impact of…

This study reports achievement and growth from kindergarten to fourth grade for three groups of English Learners (ELs): (a) ever-ELs; (b) ELs consistently eligible for service; and (c) EL and Special Education dually-identified students. All three EL groups had lower test scores than never-ELs throughout K-4. In math, ELs grew more than never-ELs…

Stakeholders at DoD language training organizations seek to improve foreign language learner test scores. The method selected for the researched organization was to add foreign language immersive virtual reality games into the learning environment at the current institute. Earlier studies provided evidence of other organizations pursuing similar…

The establishment of an English Medium Instruction (EMI) program in any educational level including the university context becomes a controversial issue regarding whether the program should be kept running or not. The present study was conducted to investigate students' voices of EMI based on their different exposure period to English. To obtain…

Differentiated second/foreign language (L2) instruction (DI) has received growing attention in pedagogical research. Yet, as a cornerstone of inclusive education, the DI is still under-documented. In this study, we integrated diagnostic assessment (DIA) and collaborative language learning in a differentiated (tiered) oral tasks intervention and…

This dissertation focused on comparing the academic achievement and language proficiency in both English and Spanish of students at risk for language and learning difficulties, with bilingual typically developing students in two bilingual educational contexts: English as a Second Language program and Spanish two-way immersion program. Data was…

Determining the effectiveness of core mathematics curricula is foundational to evidence-based practice. Examining effectiveness heterogeneity is also crucial to better understanding mathematics achievement among English language learners (ELLs). In this study, we used a quasi-experimental design (difference-in-differences) to examine the impact of…

Background/purpose: Limited studies have explored TikTok's potential in higher education, but scarce research has been conducted about the impact of this tool on developing research and linguistic competencies in Latin-American TEFL students. This research addresses this gap by analyzing the effectiveness of TikTok in supporting these competencies…

This study investigated the impact of flipped vocabulary learning on the listening achievement of EFL learners. The study participants included 60 English language learners selected based on their performance on the Michigan Test of English Language Proficiency and randomly assigned to experimental and control groups. The experimental group was…

The eclectic method allows teachers and students to easily adapt to learning needs so that learning goals or objectives can be achieved. The purpose of this article was to prove the positive impact of using the eclectic method on students' foreign language learning by comparing it to the traditional approach to teaching. This study proposed to…

English language learners (ELLs) lack academic vocabulary knowledge, an essential component that explains much of the persistent achievement gap between students who start schools as ELLs and their monolingual peers. This single-subject experimental design study addressed this issue by focusing on self-regulated vocabulary learning that helps ELLs…

Title III is a federal entitlement through the Every Student Succeeds Act (ESSA) that provides supplemental resources for English Language Learners (ELL) and immigrants students who have recently arrived to the U.S. More specifically, Title III funding supports student language acquisition and academic achievement. Depending on the English…

Dynamic Assessment (DA) is an implicit kind of assessment that most teachers and learners engage in during class time. Although there exists a body of research on the promising effects of DA, the studies have not compared the results across proficiency levels. This study examined the effect of interventionist approach to DA on Iranian English as a…