Academic Language Development for ELL Students: What It Is and How to Build It
Academic language is not a more formal version of everyday English. It is a distinct register — with its own vocabulary, grammatical structures, discourse conventions, and ways of making meaning — that students are expected to read, write, and speak in school. For native English speakers it is acquired slowly and unevenly over years of schooling. For English learners it is the second of two simultaneous acquisition challenges. Understanding what academic language is and how it develops is foundational to effective ELL instruction.
What Academic Language Is
Academic language operates at three levels — a framework developed by Pauline Gibbons and adapted widely in ELD instruction.
Word level: Vocabulary — including Tier 2 academic words (analyze, interpret, demonstrate) and Tier 3 content-specific words (photosynthesis, sovereignty, denominator). Word-level academic language also includes morphological knowledge — understanding how prefixes, suffixes, and roots signal meaning.
Sentence level: The grammatical structures of academic English — passive voice, nominalization (turning verbs into nouns: develop → development), complex sentence structures with embedded clauses, and the dense information packaging that characterizes academic prose. These structures are rare in conversational English and must be taught explicitly.
Discourse level: The way academic texts and conversations are organized — how an argument is built, how a lab report is structured, how a historical analysis moves from evidence to claim. Discourse conventions vary by discipline and are not obvious to students who have not been explicitly taught them.
Most vocabulary instruction addresses the word level. Most grammar instruction addresses the sentence level. The discourse level is the most neglected — and for ELL students working toward full academic proficiency, often the most important.
Why Academic Language Takes So Long to Develop
Jim Cummins' research established that social conversational language (BICS) typically takes 2–3 years to develop in a new language. Academic language proficiency (CALP) takes 5–7 years — and that estimate assumes consistent, high-quality academic language instruction. Without explicit instruction, the timeline extends indefinitely.
The gap between social and academic language explains why so many ELL students appear fluent in conversation but continue to struggle academically for years after arriving. They have BICS. They are still developing CALP. These are different things that develop on different timelines.
Academic Language Across the Four Domains
Academic language must be developed across all four language domains — not just writing.
Academic listening: Following a lecture, understanding discipline-specific oral language, distinguishing main ideas from supporting details in spoken text.
Academic reading: Processing dense, information-rich text with complex syntax and low-frequency vocabulary.
Academic speaking: Participating in content discussions, presenting, arguing a position, using discipline-specific oral conventions.
Academic writing: Producing extended, organized, evidence-based writing in discipline-appropriate registers.
Most instruction focuses on academic reading and writing. Academic listening and speaking are chronically underdeveloped — particularly for ELL students who are rarely given structured opportunities to practice academic oral language.
Strategies for Explicit Academic Language Development
Name the language function before the task. Tell students explicitly: "In this task you are going to compare two things. The language we use to compare includes 'similar to,' 'unlike,' and 'in contrast.'" Naming the function makes the language demand visible.
Collect and display academic language. A classroom word wall organized by function — not by alphabet or content area — gives students a visual reference for the academic language they need. "Words for comparing." "Words for arguing." "Words for cause and effect."
Deconstruct academic texts. Before asking students to produce academic writing, spend time analyzing how published academic texts are constructed. What words does the author use to signal a claim? How is evidence introduced? Making the structure of academic text visible is the prerequisite for producing it.
Structured academic conversations. Jeff Zwiers' academic conversations framework provides structured protocols for sustained academic discussion. Students practice building on each other's ideas, asking clarifying questions, and using academic language in conversation — all of which directly develop oral and written academic language proficiency.
Writing-to-learn, not just writing-to-show. Brief, low-stakes writing that requires academic language — one-sentence summaries, quick writes, exit tickets with sentence frames — builds academic language incrementally. Frequency matters more than length.
How Assist ELD helps
Assist ELD generates scaffolds that target academic language development at the word, sentence, and task level — calibrated to your lesson's specific language demands and to ELP 1–2 and 3–4.