| name | vocabulary-development |
| description | Word learning strategies, vocabulary instruction, and lexical development for reading comprehension. Covers Beck's three-tier vocabulary model, context clue strategies (definition, synonym, antonym, example, inference), morphological analysis (prefixes, suffixes, roots, etymology), word consciousness and word play, academic vocabulary across disciplines, figurative language (metaphor, simile, idiom, personification, hyperbole), dictionary and reference skills, and vocabulary-comprehension connections. Use when teaching vocabulary, selecting words for instruction, analyzing word knowledge demands of a text, or building academic vocabulary. |
| type | skill |
| category | reading |
| status | stable |
| origin | tibsfox |
| modified | false |
| first_seen | "2026-04-12T00:00:00.000Z" |
| first_path | examples/skills/reading/vocabulary-development/SKILL.md |
| superseded_by | null |
Vocabulary Development
Vocabulary knowledge is the single strongest correlate of reading comprehension (Stahl & Nagy, 2006). A reader who knows 98% of the words in a text can read it independently; at 95%, comprehension becomes strained; below 90%, the text is essentially inaccessible (Hu & Nation, 2000). This skill covers the architecture of vocabulary knowledge, strategies for learning new words, instructional approaches for teaching words, and the special demands of academic and figurative language.
Agent affinity: austen (close reading, word choice as craft), morrison (narrative voice, language as power), chomsky-r (language structure, morphology)
Concept IDs: read-word-learning-strategies, read-morphology, read-academic-vocabulary, read-figurative-language
Beck's Three-Tier Vocabulary Model
Beck, McKeown, and Kucan (2002) classify words into three tiers based on frequency, utility, and instructional value:
Tier 1 -- Basic Words
Common, everyday words that most native speakers learn through oral language before school: happy, run, table, big. These rarely require direct instruction for native speakers, though English language learners may need explicit teaching of Tier 1 words.
Tier 2 -- High-Utility Academic Words
Words that appear frequently across many domains, are used by mature language users, and can be explained using words students already know: analyze, contrast, reluctant, coincidence, absurd. These are the primary targets of vocabulary instruction because:
- They appear across all subject areas
- Knowing them provides disproportionate comprehension benefit
- They are unlikely to be learned through everyday conversation alone
- They can be defined using Tier 1 words students already know
Tier 3 -- Domain-Specific Technical Words
Low-frequency words limited to specific domains: photosynthesis, gerund, hypotenuse, isotope. These are best taught within their subject-area context rather than in isolated vocabulary lessons.
Instructional priority. Most vocabulary instruction time should target Tier 2 words. Tier 1 words do not need instruction (for native speakers). Tier 3 words are taught when the subject demands them.
Context Clue Strategies
When a reader encounters an unknown word in text, context clues offer the first line of word-learning attack. Five types of context clues account for most in-text vocabulary support:
