Decoding, fluency and comprehension in the TESOL classroom

For teachers of English to speakers of other languages, one of the most common classroom challenges sounds deceptively simple: “They can read the words, but they don’t understand.” Behind that statement are three deeply connected processes: decoding, comprehension and fluency. When TESOL or ESL teachers understand how these components interact, they can design instruction that moves students from word calling to confident, meaningful reading. 

Decoding: The Foundation of Reading 

Decoding is the ability to translate written symbols into spoken language. For multilingual learners, decoding in English can be particularly complex. English orthography is less transparent than in many other languages; one sound may be represented by multiple letter combinations, and certain letter combinations may produce different sounds. Students whose first language has a more consistent sound-symbol correspondence (such as Spanish) may initially struggle with English irregularities. Students whose first language uses a non-Latin script may be building alphabet knowledge and phonemic awareness simultaneously. 

Explicit phonics instruction remains essential at beginning and intermediate levels for students, even for older learners. TESOL teachers sometimes assume that phonics is only for early elementary classrooms, but adolescent and adult multilingual learners also benefit from systematic instruction in phonics and syllable types and patterns.  

Morphological awareness is especially powerful for English learners. Teaching common affixes and Latin/Greek roots helps students decode longer academic words and supports vocabulary growth. When students recognize that words like “predict,” “prediction” and “predictable” share a root, they are strengthening both decoding and meaning-making. Knowledge of meanings for common prefixes and suffixes allows students to see how these word parts impact meaning in complex words. 

Fluency: The Bridge Between Words and Meaning 

Fluency is often defined as accurate, automatic reading with appropriate rate and expression. It is the bridge between decoding and comprehension. When students expend too much cognitive energy sounding out words, little capacity remains for understanding the text. 

For multilingual learners, fluency challenges may stem from limited vocabulary, unfamiliar syntax or lack of exposure to English prosody (rhythm and intonation). Fluency instruction in TESOL settings should therefore go beyond speed. Effective fluency practices include: 

• Modeled fluent reading – teachers read aloud while students follow along, hearing phrasing and intonation. 

• Choral and echo reading – students practice reading with teacher support.  

• Repeated reading – short passages are reread multiple times to build automatic reading skills. 

• Reader’s theater – students rehearse and perform scripts, focusing on expression and meaning. 

Importantly, fluency practice should use texts at an accessible level. If a passage contains too many unknown words, repeated reading will not build true fluency. Selecting texts with controlled vocabulary and supportive context ensures that practice reinforces both accuracy and confidence. 

Comprehension: Constructing Meaning 

Comprehension is the ultimate goal of reading. It involves constructing meaning from text by integrating background knowledge, vocabulary, language structures and strategic thinking. 

English learners may decode accurately yet misunderstand due to limited background knowledge or unfamiliar cultural references. For this reason, comprehension instruction in TESOL classrooms must be both linguistic and contextual. Key strategies include: 

• Focusing on high-utility academic words and content-specific terms. 

• Using visuals, discussions and real-world connections to build context. 

• Modeling and practicing predicting, questioning, clarifying and summarizing. 

• Using graphic organizers and visual supports to help students process complex information. 

• Encouraging oral language development through structured discussion. 

Comprehension is also closely tied to vocabulary breadth and depth. Without sufficient vocabulary, students may grasp the gist but miss nuance. Intentional vocabulary instruction paired with a variety of readings supports long-term growth. 

For English learners, like all readers, language comprehension includes vocabulary knowledge, grammatical understanding and cultural / background knowledge familiarity. Thus, TESOL teachers must address both sides of the reading equation by leaning on oral language mastery. Strong phonics without oral language development will not produce skilled readers. Likewise, rich discussion without attention to decoding will leave gaps in foundational reading skills. 

Practical Classroom Integration 

Effective TESOL literacy instruction weaves decoding, fluency and comprehension together, rather than treating them as isolated units. A sample lesson progression might look like this:  

1. Present a target text and activate or build up background knowledge. 
2. Pre-teach key vocabulary and morphological patterns. 
3. Practice decoding challenging words. 
4. Model fluent reading of the passage. 
5. Engage students in guided and repeated reading. 
6. Facilitate comprehension through discussion and written response. 

Assessment of reading skill should also be multidimensional. Running records, fluency timings, vocabulary checks and comprehension questions each provide part of the picture of a student’s reading level. Data-informed instruction allows teachers to identify whether a student’s difficulty stems primarily from decoding, fluency or language comprehension. 

Growing as a Literacy-focused TESOL Educator 

Teaching multilingual readers requires both linguistic knowledge and instructional expertise. Educators benefit from understanding second language acquisition theory, evidence-based literacy practices and culturally responsive pedagogy. 

For teachers seeking to deepen their impact, the M.Ed. in TESOL at Concordia University, Nebraska equips educators to serve diverse learners with confidence. The program emphasizes research-based literacy instruction, language development, assessment and practical classroom strategies grounded in a Christ-centered approach. Graduates are prepared to strengthen decoding, fluency and comprehension for English learners in K-12 and adult settings. 

By approaching reading as an integrated process – and by continuing to grow professionally – TESOL teachers can help students move beyond simply reading words on a page to truly understanding and engaging with the world through language. 

If you are passionate about helping multilingual learners move from decoding words to truly comprehending and engaging with text, consider deepening your expertise through Concordia University, Nebraska’s M.Ed. in TESOL. Designed for practicing educators of various kinds, the program equips teachers with research-based literacy strategies, advanced understanding of language acquisition and practical tools for supporting English learners across grade levels.