Teacher Practical Guidance:
Bilingual Instruction (English Language Learners – ELL)
Category: Content
Rank Order
Effect Size
Achievement Gain %
How-To Strategies
BENEFITS
Academic benefits
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Higher long-term achievement: Well-implemented bilingual and dual-language programs are linked to equal or higher performance in reading and math compared with English-only peers, especially by upper elementary and secondary grades.
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Stronger literacy in both languages: Skills in one language transfer to the other, so students who learn to read well in their home language tend to read as well or better in the second language over time.
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Deeper content understanding: Learning content in two languages promotes metalinguistic awareness and forces students to process ideas more deeply, supporting critical thinking and comprehension.
Cognitive and brain benefits
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Enhanced executive function: Bilingual students often show better attention control, task-switching, and inhibition, which help them manage complex classroom tasks.
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Better memory and problem-solving: Using two languages over time strengthens working memory, reasoning, and flexible thinking, which support learning across subjects.
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Long-term brain health: Lifelong bilingualism is associated with delayed onset of dementia and cognitive decline, likely due to increased cognitive reserve.
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Stronger identity and belonging: Maintaining and valuing the home language affirms students’ identities, which is linked to higher self-esteem and sense of belonging in school.
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Greater cultural awareness and empathy: Bilingual education exposes students to multiple perspectives and cultures, supporting perspective-taking and intercultural competence.
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Improved social skills: Bilingual children often become more attuned to social cues, such as tone and context, as they regularly monitor who speaks which language.
College, career, and life benefits
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Expanded career opportunities: Proficiency in more than one language is associated with broader job options and higher earning potential in many sectors (e.g., healthcare, business, education, diplomacy).
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Global readiness: Bilingual students are better prepared to participate in global networks, study abroad, and work in international or multicultural settings.
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Lifelong flexibility: The combination of cognitive flexibility, intercultural competence, and dual-language literacy supports adaptability in rapidly changing academic and work environments. link
HOW TO
1. Decide the big-picture model
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Choose a program type and language-time split: transitional, maintenance, or dual language (e.g., 90/10, 80/20, 50/50), and define which subjects are in which language.
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Align goals: Is the aim access to content while acquiring English, or full bilingualism/biliteracy? Put this in writing and communicate it to staff and families.
2. Build the foundational conditions
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Ensure staffing and proficiency: Place teachers who are truly proficient in the languages of instruction and provide ongoing PD in bilingual/dual-language pedagogy.
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Secure materials in both languages: Adopt or develop content and literacy resources, tech tools, and assessments in all languages used for instruction.
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Engage families and community: Offer information sessions, bilingual communication, and roles for parents in planning and supporting the program.
3. Design curriculum and schedules
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Map language allocation across grades: Create a written plan showing how much time and which subjects are taught in each language at every grade level.
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Align standards and units: Backward-design units so both content standards and language objectives (for each language) are explicit and coherent across the program.
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Schedule for continuity: Build master schedules that protect uninterrupted blocks in each language and avoid constant switching in the same lesson.
4. Use high-yield classroom practices
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Plan clear content and language objectives in each language, and make them visible and student-friendly.
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Provide strong scaffolds: visuals, gestures, modeling, sentence frames, word banks, and graphic organizers, with explicit, step-by-step instruction.
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Prioritize interaction: Use Think-Pair-Share, cooperative groups, and structured talk so students use both languages for meaningful communication.
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Integrate technology: Use multimedia, bilingual digital platforms, and translation/support tools in both languages to extend access and practice.
5. Monitor, refine, and sustain
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Collect and use data: Track progress in both languages (literacy and content), use baseline data, and adjust instruction and supports accordingly.
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Support teachers continuously: Provide PLC time, coaching, and collaborative planning focused on bilingual pedagogy, translanguaging, and culturally responsive practice.
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Institutionalize the program: Develop a written handbook, clear roles, recruitment and placement procedures, and a long-term evaluation plan so the program survives leadership changes.link
CHALLENGES
WHAT NOT TO DO
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Do not improvise the model year to year (e.g., changing language allocation or exit criteria without a plan); inconsistency erodes results and trust.
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Do not treat bilingual education as a short-term “remedial” step to get students into English-only as fast as possible if your stated goal is biliteracy.
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Do not start a dual-language strand without ensuring long-term commitment, staffing, and resources; under-resourced programs fuel criticism.
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Do not default to English whenever things get hard; overuse of English quickly crowds out the partner language and weakens bilingual goals.
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Do not mix languages and translate everything in the same lesson (teacher says it in Spanish, then repeats in English); research and best-practice guidance warn this reduces need to attend to the target language.
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Do not ignore students’ vernacular varieties (e.g., local Spanish) or replace them with unfamiliar “textbook” forms only; this creates a “trilingual” situation and can alienate students.
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Do not rely on English materials and ask teachers to constantly translate; select or develop true partner-language curriculum instead.
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Do not lower expectations or track bilingual learners into “easy” work or low groups based on language status rather than actual content understanding.
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Do not assess only in English if you then conclude students are “behind” without considering what they can do in their other language.
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Do not frame bilingualism as a problem to fix (e.g., “get rid of Spanish so they can learn”); this undercuts family trust and contradicts the research base.
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Do not ignore family input when designing or adjusting the program; lack of authentic engagement often leads to backlash or low enrollment.
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Do not blame the bilingual model for outcomes that actually stem from broader inequities (funding, segregation, poverty, special education access). link
How-To Resources
ARTICLES
Link – ARTICLE (TEAST) What is ELL?
Link – ARTICLE (UoPeople) What is ELL and why is it important?
Link – ARTICLE (PostEDU) Understanding ESL and ELL
Link – ARTICLE (Participate) What is dual language education?
Link – ARTICLE (Participate) 5 powerful benefits of dual language programs
Link – ARTICLE (Participate) Dual language implementation: Program models
Link – ARTICLE (USTA) The importance of bilingual education in today’s classrooms
Link – ARTICLE (EduNorthwest) Treating language as a strength
Link – ARTICLE (Zero2Three) Dual language development: Double the benefits
Link – ARTICLE (EduTopia) 4 practical ways to make instruction accessible for multilingual learners
Link – ARTICLE (EduTopia) Teaching ELL and English content simultaneously
Link – ARTICLE (ColorinCol) Bilingual education: The failed experiment?
Link – ARTICLE (Unitedlisen) Common challenges in bilingual education and how to fix them
Link – ARTICLE (IDRA) Successful bilingual programs
RESEARCH / REPORT / GUIDE
Link – RESEARCH (PMC) Bilingual education for young children: review of effects
Link – RESEARCH(PMC) Cognitive benefits of being bilingual
Link – RESEARCH (PMC) Why bilingual development is not easy
Link – RESEARCH (EdPolicy) Effectiveness of 4 bilingual programs
Link – REVIEW (ScienceDirect) Bilingual instruction: An overview
Link – REPORT (EBSCO) Bilingual education
Link – GUIDE (NYSED) Resource guide ELL
Link – GUIDE (ERIC) Planning guide for bilingual programs
Link – GUIDE (Colorado) Bilingual literacy guidance
Link – GUIDE (OSSE) ELL program models
Link – GUIDE (ERIC) Instructional models for ELL
VIDEO
Link – Video (WWC) Evidence Based ELL Strategies
Link – VIDEO (TED) Benefits of bilingual brain
Link – VIDEO (YouTube) Types of bilingual & ESL programs
Link – VIDEO (YouTube) ESL, ELL & Bilingual education videos
Link – VIDEO (CorinCol) ELL video library
Link – VIDEO (YouTube) Bilingual educators: Transforming lives through language education
PROGRAM / CURRICULUM
State/district guides like “Serving English Learners: English Language Program Models” provide concise descriptions of major models (two‑way immersion, inclusion/collaborative, content‑based EL, newcomer, sheltered content) with benefits, staffing, and scheduling considerations. link
Colorín Colorado’s overview of instructional programs for ELLs clearly distinguishes between bilingual models (two‑way, developmental, transitional) and English‑only models (sheltered, SDAIE, structured immersion), outlining goals and design features. link
1. ESL Pull‑Out – ELs spend most of the day in a general education classroom but are “pulled out” for a portion of the day for targeted English as a Second Language instruction with an ESL‑certified teacher.
2. ESL Class Period- Common in secondary settings; ELs take a dedicated ESL course during a regular period (often for credit) focused on English language development while attending other content classes with varying levels of support.
3. ESL Resource Center / Push‑In ESL – ELLs either go to a resource center for specialized support or receive push‑in services from an ESL teacher who comes into the general ed classroom; the goal is language development embedded in core instruction and less social isolation.
4. Content‑Based ESL – ESL‑certified teachers teach language through grade‑level content (e.g., science or social studies), so students develop English and academic knowledge simultaneously; this includes models like structured immersion and SDAIE as content‑based variants.
5. Sheltered Instruction / SDAIE – Content teachers use specialized strategies (visuals, scaffolds, language objectives, structured interaction) to make grade‑level content comprehensible while promoting English development; often used in EL‑only or mixed classes.
6. Structured English Immersion (SEI) – All instruction is in English, but at a level adjusted to students’ proficiency with heavy language supports and sheltered techniques; students typically are grouped by English level and may transition to mainstream as they reach proficiency.
7. Transitional Bilingual Education (Early‑Exit or Late‑Exit) – Students receive instruction in both their home language and English at first, then gradually transition to all‑English instruction once they reach a set proficiency level; the home language is used mainly to support the move into English.
8. Dual Language / Two‑Way Immersion (TWI) – Classes include both native English speakers and native speakers of the partner language (often Spanish), with planned 50/50 or 90/10 time in each language; goals include high academic achievement, bilingualism, and biliteracy.
9. One‑Way Dual Language / Developmental (Maintenance) Bilingual – Designed primarily for ELs who share a home language; provides long‑term content instruction in both the home language and English, aiming to maintain and develop the home language while adding English.
10. Newcomer Programs – Short‑term, intensive programs for recently arrived ELs (often with limited prior schooling) that focus on survival English, acculturation, and foundational literacy and numeracy, while also connecting students to core content and the regular school program.
DIGITAL
Language development and practice
Duolingo, Monkey Puzzles, kids EL apps – Free, gamified language‑learning platforms that build vocabulary, basic grammar, and listening/speaking through short activities.
BrainPOP ELL – Short animated movies, quizzes, and games that explicitly teach vocabulary and grammar in context. Useful for whole‑group mini‑lessons followed by structured oral/written responses.
EnglishMediaLab, English Resources collections – Sites with free quizzes, games, and pronunciation activities that students can use for focused skills practice.
Reading, writing, and content access
ReadWorks, Newsela, Epic! – Offer leveled digital texts, read‑aloud or audio support, and in some cases translation (e.g., Spanish) and built‑in questions. Good for pushing ELs into grade‑level content with scaffolds (audio, glossaries, visuals).
Amira, Writable, English 3D (HMH) – Amira: 1:1 oral reading tutor/fluency assessment with adaptive support. Writable: guided writing practice and automated feedback; can be powerful for sentence frames and revision cycles. English 3D: a structured ELD curriculum with authentic texts and daily formative assessments designed for multilingual learners.
Multilingual Learning Toolkit (P–3) – Free hub with research‑based strategies and ready‑to‑use resources specifically for PreK–3 educators of multilingual learners.Useful for planning: you pull a principle (e.g., oral language) and get matching routines, templates, and videos.
Student voice, speaking, and creation
Flip (Flipgrid), Book Creator, VoiceThread, Puppet Pals – Let students record video/audio responses, create digital books, or assemble multimedia stories, which lowers the barrier for emerging writers and increases output.
Padlet, Jamboard‑style tools – Interactive bulletin boards where students post text, images, audio, or video; excellent for collaborative vocabulary walls, “see–think–wonder,” and multilingual word banks.
Simple audio tools (Voice Recorder, Vocaroo) –Students record themselves reading or speaking, then listen back to analyze pronunciation, expression, and fluency.
Vocabulary, review, and formative assessment
Quizlet, Quizizz, Kahoot – Flashcards, games, and live quizzes; supports multimodal input and repetition. Great for high‑utility vocab, language chunks, sentence stems, and quick checks for comprehension.
ABCya, BrainPOP (core), other game sites – Standards-aligned reading/math games that build language through content contexts.
Planning supports and curated hubs
Colorín Colorado – Technology & ELLs – Guidance on choosing and using tech with multilingual learners, including multimedia projects and bilingual family‑facing ideas.
Ensemble Learning’s “Best 12 ELL Resources” A 2026 review of widely used platforms (e.g., ReadWorks, Epic, others) with specific notes on why each is effective for ELLs and where it fits (reading, writing, early learning, etc.).
References
Adesope, Lavin, Thompson, & Ungerleider. (2010). A systematic review and meta-analysis of the cognitive correlates of bilingualism. Review of Educational Research.
Bialystok E. (2018). Bilingual education for young children: review of the effects and consequences. Int J Biling Educ Biling. 21(6):666-679. doi: 10.1080/13670050.2016.1203859
IES What Works Clearinghouse (2014)Teaching Academic and Literacy Content to ELL Students. Link
Hoff E. (2021). Why bilingual development is not easy. Adv Child Dev Behav. ;61:129-167. doi: 10.1016/bs.acdb.2021.03.002.
Marian V, Shook A. (2012). The cognitive benefits of being bilingual. Cerebrum. Sep;2012:13. Epub 2012 Oct 31.
Prevoo, Malda, Mesman, & van IJzendoorn. (2016). Within-and cross-language relations between oral language proficiency and school outcomes in bilingual children with an immigrant background: A meta-analytical study. Review of Educational Research
Reljic, Ferring, & Martin. (2015). A meta-analysis on the effectiveness of bilingual programs in Europe. Review of Educational Research.
Rolstad, Mahoney, & Glass. (2005). The Big Picture: A Meta-Analysis of Program Effectiveness Research on English Language Learners. Educational Policy.
Slavin & Cheung. (2005). A Synthesis of Research on Language of Reading Instruction for English Language Learners. Review of Educational Research.
Willig. (1985). A Meta-Analysis of Selected Studies on the Effectiveness of Bilingual Education. Review of Educational Research.
Bilingual Instruction (English Language Learners – ELL)
DEFINITIONS
Bilingual instruction is teaching academic content through two languages—typically students’ native language and a second language—so that both content learning and proficiency in both languages develop over time. Bilingual instruction uses two languages as media of instruction for significant portions of the curriculum (e.g., math, science, social studies), not just as subjects. One of the languages is usually the students’ home or community language and the other is the dominant or target language (often English in U.S. schools). The proportion of each language can vary by model (e.g., 90/10, 80/20, 50/50), but both are planned and systematic parts of instruction rather than informal translation.
How it differs from ESL: ESL or English-only instruction (immersion) typically teaches content mainly in English, with the home language used minimally or informally. Bilingual instruction, in contrast, deliberately embeds the home language as a planned medium for teaching content and developing literacy, not just as a support. link
DATA
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13 meta-analysis reviews
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515 research studies
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48,000 students in studies
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4 Confidence level. Hattie (2023) p. 251
QUOTES
13 meta-analysis reviews
515 research studies
48,000 students in studies
4 Confidence level. Hattie (2023) p. 251
The history of bilingual education in the U.S. is marked by fluctuating political support, with debates centered on its effectiveness compared to English-only instruction. Key historical moments, such as the Bilingual Education Act of 1968 and the Supreme Court ruling in Lau v. Nichols, have shaped the landscape of bilingual education, advocating for the rights of English language learners (ELLs) to receive specialized instruction. link
Bilingual instruction benefits students academically, cognitively, socially, and economically, with research showing gains that often surpass those of comparable monolingual peers over time.link
…the majority of the world’s population is bilingual or multilingual. In a survey conducted by the European Commission in 2006, 56 percent of respondents reported being able to speak in a language other than their mother tongue.link
