ELL stands for English Language Learner, and in special education it refers to students who are both learning English as a new language and receiving services for a disability. These students are often called “dual-identified” because they qualify under two separate federal frameworks: the Individuals with Disabilities Education Act (IDEA) for their disability, and Title III of the Every Student Succeeds Act (ESSA) for their English language needs. As of the 2021-2022 school year, 15.8 percent of English learners in U.S. public schools had one or more disabilities.
Why Dual Identification Matters
A student who is only learning English needs language instruction. A student who only has a disability needs special education services. A dual-identified student needs both, and the two sets of supports must work together rather than compete. Schools are required to provide English language development services and disability-related services simultaneously. One does not replace the other.
This distinction is important because the root cause of a student’s academic struggles determines what kind of help they receive. A child who reads below grade level because they are still acquiring English needs different interventions than a child who reads below grade level because of a specific learning disability. When a student has both going on at once, the educational plan has to address each factor on its own terms.
Telling Language Acquisition Apart From a Disability
One of the biggest challenges in special education for ELLs is figuring out whether a child’s difficulties come from the normal process of learning a second language or from an underlying disability. Misidentification in either direction causes real harm. A child wrongly placed in special education may miss out on the language instruction they actually need, while a child whose disability goes unrecognized may fall further behind without appropriate support.
Researchers at Vanderbilt University’s IRIS Center outline a core principle: a true disability will show up in both of a child’s languages and across multiple settings, not just in English and not just at school. If a child struggles with reading only in English but performs at expected levels in their home language, that pattern points toward language acquisition rather than a learning disability. If the difficulties appear in both languages, a disability is more likely.
Schools use several screening questions to guide this process:
- How long has the child been exposed to English compared to their home language?
- Are the difficulties present in both languages?
- Do the concerns show up in multiple settings, such as home and school?
- Have targeted teaching strategies been tried, and did they produce progress?
Typically developing ELLs will show noticeable gains when teachers use developmentally appropriate strategies. Students with disabilities often will not, even with consistent support. That difference in response is a key signal.
How Schools Assess ELLs for Disabilities
Eligibility for special education cannot rest on a single test score. For ELLs, this is especially critical because many standardized tests were developed using English-speaking children, which can make results unreliable for students from different language backgrounds. If a test was not normed on children who share the student’s linguistic background, that undermines the validity of the results.
Instead, schools are expected to draw from multiple data sources. Family input is one: parents and caregivers can describe how their child develops and communicates in the home language, providing context that a classroom assessment alone cannot capture. Classroom observations are another, focusing on the child’s actual behaviors across different routines and settings. Standardized measures may still be part of the process, but they should be combined with performance-based assessments and professional judgment.
A bilingual speech-language pathologist can be especially helpful in sorting out whether a child’s speech or language patterns reflect the normal developmental process for bilingual children or signal something more. The evaluation results must clearly demonstrate a disability or delay in all of the child’s languages before a special education placement is appropriate.
What a Linguistically Appropriate IEP Looks Like
When an ELL qualifies for special education, the student’s Individualized Education Program (the IEP, which is the legal document spelling out the child’s services and goals) must account for their language needs alongside their disability. The IEP team is required to consider the student’s cognitive level, linguistic level, developmental level in both their primary language and English, and their overall performance in English language instruction.
Goals written into the IEP should be linguistically appropriate, meaning they are aligned to the student’s current English proficiency level rather than written as if the student were a native English speaker. These are not separate English-as-a-second-language goals. They are academic and functional goals drafted in a way that accounts for where the student actually is in their language development, so the child can realistically access grade-level curriculum.
The IEP team also decides whether the student needs primary language support. This does not mean the child receives all instruction in their home language. It means the school uses the student’s first language strategically, for example by previewing directions in the home language, providing translations of key materials, or using oral interpretation to help the student access core content. The goal is to build a bridge between what the student already knows and the English-language curriculum they are working toward.
English Language Services Must Continue
Having a disability does not exempt a student from English language development services, and receiving English language services does not reduce a student’s right to special education. Federal guidance from the U.S. Department of Education makes clear that ELLs with disabilities must have access to both integrated and designated English language development.
Integrated English language development happens throughout the regular school day. Teachers weave English language standards into content instruction, using strategies that give ELLs access to lessons while building their language skills. Designated English language development is a protected block of time during the school day focused specifically on developing English language skills, grouped by proficiency level.
A dual-identified student is entitled to both types of English language instruction on top of whatever special education services their IEP provides.
Testing Accommodations and Exiting ELL Status
Every year, ELLs take an English language proficiency assessment to measure their progress. For dual-identified students, the IEP team decides on a case-by-case basis whether the student needs accommodations on that assessment. If the student has the most significant cognitive disabilities, the team may determine that an alternate assessment is needed.
In rare cases, a student’s disability may make it impossible to assess one or more language domains (speaking, listening, reading, or writing). When that happens, the school assesses the student on the remaining domains. The student can eventually be exited from ELL status based on proficient scores in the domains where assessment is possible.
The exit criteria are the same for ELLs with and without disabilities. A student leaves ELL status when they meet the state’s standardized exit requirements, not when their IEP team decides the student has had enough language services. This protects dual-identified students from being prematurely exited before they have actually reached proficiency.
The Scale of the Population
English learners made up about 10.1 percent of all K-12 public school students as of fall 2020. With nearly 16 percent of those students also identified as having a disability, the dual-identified population is substantial. The most common disability categories for these students are specific learning disabilities and speech-language impairments, which are also the categories most easily confused with typical second-language acquisition patterns. That overlap is precisely why careful, multilingual assessment practices matter so much for this group of students.