2017
DOI: 10.1017/s0267190517000034
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Validating the Power of Bilingual Schooling: Thirty-Two Years of Large-Scale, Longitudinal Research

Abstract: This chapter summarizes the findings of 32 years of research from all of our longitudinal studies to date, conducted in 36 school districts in 16 U.S. states, more than 7.5 million student records analyzed, following English learners (of all language backgrounds) as far as Grades K–12. These studies are very generalizable to all regions and contexts of the United States and have been replicated in other countries, answering questions regarding program effectiveness for policymakers in education. We have shown … Show more

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Cited by 185 publications
(106 citation statements)
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References 27 publications
(26 reference statements)
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“…not one of their local indigenous languages) to be able to then use this language effectively for academic purposes (Heugh 2017; see Alidou et al 2006). We later refer to similar findings in non-African contexts (Collier and Thomas 2017;Cummins 2008). For the present, we wish simply to draw attention to Heugh's observation in relation to the African research that 'a child's mother tongue or local language is indispensable as the main medium of instruction [emphasis added] during these six to eight years' (2017, p. 2 of 4, online article).…”
Section: Different Language Immersion Models Relative To Opportunitiementioning
confidence: 87%
“…not one of their local indigenous languages) to be able to then use this language effectively for academic purposes (Heugh 2017; see Alidou et al 2006). We later refer to similar findings in non-African contexts (Collier and Thomas 2017;Cummins 2008). For the present, we wish simply to draw attention to Heugh's observation in relation to the African research that 'a child's mother tongue or local language is indispensable as the main medium of instruction [emphasis added] during these six to eight years' (2017, p. 2 of 4, online article).…”
Section: Different Language Immersion Models Relative To Opportunitiementioning
confidence: 87%
“…TWI is intended to expand linguistic repertoires, increase academic achievement, and offer opportunities for intercultural learning. Research has provided evidence of success especially in the first two areas (Burkhauser et al., ; Collier & Thomas, ; Steele et al., ). In this way, TWI programs are often thought of as transformational since groups who often struggle in other programs, such as students classified as “English learners,” show more positive academic outcomes.…”
Section: A Critical Approach To Us Educational Language Policymentioning
confidence: 99%
“…The 90:10 model is more promising for ensuring that learners reach grade‐level achievement in the L2 (Thomas & Collier, 2002). Regardless of the program model, recent research has found that DLE programs provide benefits for all learners, including those who receive special education services (Collier & Thomas, 2017).…”
Section: Literature Reviewmentioning
confidence: 99%
“…The effectiveness of the TWI program model for promoting bilingualism, biculturalism, and biliteracy, given several years of participating in an effective program, is well established through research (Collier & Thomas, 2017; K. Lindholm‐Leary, 2016). Both native English speakers and non‐native English speakers who begin a TWI program in kindergarten and continue through fifth grade outperform their monolingual peers (who participate in English‐only programs) on standardized tests in English (K. J. Lindholm‐Leary & Borsato, 2006).…”
Section: Literature Reviewmentioning
confidence: 99%
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