Discourse Analysis & Academic Language

Scope of Discourse Analysis in ESL Education

While sentence-level grammar focuses on clause construction, discourse analysis investigates how strings of sentences are organized to form unified, coherent texts, conversations, and academic arguments. For Emergent Bilinguals progressing from basic conversational communication to advanced academic achievement, mastering sentence-level grammar is insufficient. Students must learn to navigate the macro-level organizational patterns and linguistic markers that govern extended oral and written discourse in U.S. public schools.

Cohesion vs. Coherence

A central distinction in discourse analysis is the relationship between cohesion and coherence:

• Cohesion: Represents the explicit grammatical and lexical connections that link sentences and paragraphs together. Cohesive devices act as the visible "glue" of a text. Examples include pronoun referencing (Mary bought a book. She read it.), transitional conjunctions (however, furthermore, consequently), lexical repetition, substitution (I ordered coffee and my friend got the same), and ellipsis (Some students stayed; others left [the room]).
• Coherence: Represents the underlying logical flow, conceptual clarity, and overall sense of a text. A text is coherent when ideas progress logically and make sense to the reader within a clear rhetorical framework (such as cause-and-effect, compare-and-contrast, or chronological sequence).

A text can be cohesive (containing transitional words) without being coherent if the underlying ideas are disconnected. ESL instruction must guide students to build both structural cohesion and logical coherence in academic writing.

Cohesive Devices Taxonomy in Extended Academic Text

To analyze extended academic discourse, educators classify cohesive ties into five primary categories established by Halliday and Hasan:

1. Pronominal Reference: Anaphoric reference (referring backward: "The cell divides; it replicates DNA") and cataphoric reference (referring forward: "Because she was tired, Maria went home").
2. Conjunctions: Connective markers signalling additive (furthermore), adversative (however), causal (consequently), and temporal (subsequently) relationships.
3. Lexical Cohesion: Using repetition, synonyms, superordinates (vehicle for car), and collocations (conduct an experiment).
4. Substitution: Replacing a word or clause with a filler term ("Do you need a pencil?" "I have one").
5. Ellipsis: Omitting an understood element to streamline academic flow.

Syntactic Features of Academic Discourse (CALP)

Academic discourse features specialized grammatical structures designed to package dense information concisely:

1. Nominalization: The process of converting verbs or adjectives into abstract nouns (e.g., turning the verb evaporate into the noun evaporation, or the adjective dense into density). Nominalization allows writers to condense complex actions into static concepts suitable for scientific and historical analysis (e.g., "The rapid urbanization of the region led to environmental degradation."). While nominalization increases academic precision, it significantly increases cognitive reading load for Emergent Bilinguals.
2. Passive Voice: Academic texts frequently utilize passive voice to maintain an objective tone and emphasize the receiver or outcome of an action rather than the agent (e.g., "The solution was heated to 100°C" rather than "We heated the solution").
3. Complex Sentence Embedding: Extensive use of relative clauses, subordinate clauses, and participial phrases to articulate nuanced relationships between variables.

The Three-Tier Vocabulary Model: Bricks and Mortar

Vocabulary instruction in sheltered ESL settings is informed by Beck, McKeown, and Kucan's Three-Tier Model, frequently conceptualized in Texas ESL training as "Bricks and Mortar":

• Tier 1 Vocabulary (Everyday Language): Basic, high-frequency conversational words acquired naturally through social interaction (e.g., dog, run, happy, house, talk). Corresponds to BICS.
• Tier 2 Vocabulary (General Academic / "Mortar" Words): High-utility, cross-curricular academic words used across multiple subject areas (e.g., analyze, evaluate, contrast, consequently, formulate, significant, indicate). Mortar words act as the glue holding academic concepts together.
• Tier 3 Vocabulary (Content-Specific / "Brick" Words): Low-frequency, domain-specific technical terms unique to a particular discipline (e.g., photosynthesis, mitosis, isotope, oligarchy, isosceles). Bricks represent the core subject concepts.

ESL educators must recognize that Emergent Bilinguals often struggle more with Tier 2 mortar words than Tier 3 brick words. A student may memorize the scientific definition of photosynthesis (a brick word) but fail a STAAR assessment item because they do not understand what the prompt requires when it asks them to synthesize or evaluate (mortar words).

Three-Tier Vocabulary Framework Matrix

Rhetorical Text Structures and Discourse Signpost Instruction

Academic disciplines employ distinct macro-level text structures to present arguments and scientific findings. Educators can scaffold discourse-level reading comprehension by explicitly teaching text signposts and pairing them with visual graphic organizers:

• Compare and Contrast: Signposts (however, whereas, on the other hand, similarly, conversely) → Paired with Venn Diagrams and T-Charts.
• Cause and Effect: Signposts (consequently, as a result, therefore, due to, thus) → Paired with Cause-and-Effect Flowcharts.
• Chronological Sequence: Signposts (initially, subsequently, prior to, eventually, finally) → Paired with Timelines and Sequence Ladders.
• Problem and Solution: Signposts (to address this issue, one solution is, consequently) → Paired with Problem-Solution Matrices.

Explicit Discourse Scaffolding Protocols in Texas Classrooms

To build CALP discourse proficiency, Texas educators implement structured routines:

• Discourse Signal Spotting: Students highlight transitional signposts in mentor texts before writing.
• Cohesive Sentence Stems: Teachers provide paragraph frames requiring explicit conjunctions ("Although [cause], [effect], which leads to...").
• Deconstructive Reading: Students break dense nominalized academic paragraphs back into active-voice agent-verb-object components to build underlying conceptual comprehension before engaging with TEKS assessment items.