We present findings from a randomized controlled trial of "Descubriendo la Lectura" (DLL), an intervention designed to improve the literacy skills of Spanish-speaking first graders, who are struggling with reading. DLL offers one-on-one native language literacy instruction for 12 to 20 weeks to each school's lowest performing…

Purpose: This study aimed to examine the effect of an intensive vocabulary intervention embedded in e-books on the vocabulary skills of young Spanish-English speaking English learners (ELs) from low-socioeconomic status backgrounds. Method: Children (N = 288) in kindergarten and 1st grade were randomly assigned to treatment and read-only…

Given the growing number of Latino English learners and the lack of evidence-based educational opportunities they are provided, we investigated the impact of one potentially effective literacy intervention that targets struggling first-grade Spanish-speaking students: Descubriendo La Lectura (DLL). DLL provides first-grade Spanish-speaking…

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…

The purpose of this study was to test the efficacy of a Tier 2 standard protocol supplemental intervention designed simultaneously to develop root word vocabulary and reinforce decoding skills being taught to all students in the core beginning reading program with kindergarten Spanish-speaking English learners (ELs). Participating students were…

This article reports the outcomes of a multiyear study comparing the English and Spanish language and reading performance of Spanish-dominant children randomly assigned, beginning in kindergarten, to transitional bilingual education (TBE) or structured English immersion (SEI) for periods of up to 5 years. On the Peabody Picture Vocabulary Test and…

This study investigated the effects of three instructional conditions on precursors to successful reading for Spanish-speaking English language learners (ELL). The study was conducted using a randomized, alternate treatment control group design specifically targeting phonological awareness (PA) listening comprehension (LC), and decoding in a…

This study compared the effects of 2 supplemental interventions on the beginning reading performance of kindergarteners identified as at risk of reading difficulty. Students (N = 206) were assigned randomly at the classroom level either to an explicit/systematic commercial program or to a school-designed practice intervention taught 30 min per day…

This study reports Year 1 findings from a multisite cluster randomized controlled trial of a cognitive strategies approach to teaching text-based analytical writing for mainstreamed Latino English language learners (ELLs) in 9 middle schools and 6 high schools. There were 103 English teachers stratified by school and grade and then randomly…

This study was conducted to explore the effects of a two-way immersion bilingual program on maintenance/acquisition of Spanish-language proficiency and on reading and mathematics achievement in English over a period of 4 academic years. The researchers used Hierarchical Linear Modeling (HLM) techniques to compare the effects of two different…

Examined effects of instructional components for studying literature on limited-English-proficient and English-proficient students, part of an ongoing program to estimate effects of several individual components of a Spanish-to-English language-arts transition program. Found that combined effects of literature logs and instructional conversations…

Gaps in reading performance between Anglo and Latino children are associated with gaps in vocabulary knowledge. An intervention was designed to enhance fifth graders' academic vocabulary. The meanings of academically useful words were taught together with strategies for using information from context, from morphology, from knowledge about multiple…

Two studies of Grade 1 reading interventions for English-language (EL) learners at risk for reading problems were conducted. Two samples of EL students were randomly assigned to a treatment or untreated comparison group on the basis of their language of instruction for core reading (i.e., Spanish or English). In all, 91 students completed the…

A first-grade reading and language development intervention for English language learners (Spanish/English) at risk for reading difficulties was examined. The intervention was conducted in the same language as students' core reading instruction (English). Two hundred sixteen first-grade students from 14 classrooms in 4 schools from 2 districts…