By the time they start primary school, most children have a robust lexicon of words that they are able to employ for different purposes (Benson, 2009). However, as they progress through the years, they begin to learn more and more words, slowly acquiring a rich and varied vocabulary, capable of expressing great subtlety in meaning.
This includes more abstract and technical terms, as well as low frequency, subject-specific “Tier 3” words. Many of these words will be multisyllabic and morphologically complex, containing a root word and at least one affix (a prefix or suffix) (Nippold, 2018). This stage of vocabulary acquisition is typically associated with literacy development and increased exposure to written materials which contain more of these “literate” forms.
Written language differs from oral language in a number of ways, but chiefly in the amount of contextualization or abstraction (Benson, 2009). Whilst oral language is supported by non-linguistic information such as the speaker’s use of gesture and tone of voice, as well as the physical surroundings in which the interaction takes place, written language must stand alone (Rubin, 1987). (For more information about the differences between oral and written language, see my post: https://secondaryschoolslt.wordpress.com/2026/04/06/how-are-oral-and-written-language-different/)
This results in a particular style of language that is denser, with a more specified lexicon and advanced syntactic structures (Benson, 2009) to convey complex thoughts and relationships between ideas. This style, used in the “literate activities of reading, writing, listening to lectures, talking about language and thought and mastering the school curriculum” has been termed “literate language”, or the “literate lexicon” (Nippold, 1998, p.21).
Words included under this umbrella are a wide range of conjunctions, adverbs of likelihood and magnitude, factive and non-factive verbs, metacognitive and metalinguistic verbs, polysemous and double function words, as well as adverbial conjuncts and derived nominals and adjectives (Nippold, 1998).
Whilst simple coordinating conjunctions such as “and”, “but” and “so” are relied on in casual conversation, written and instructional discourse, especially at secondary level, is characterized by a wider range of subordinating conjunctions, including “whereas”, “unless” and “provided that”, to express more complex relationships between ideas (Balthazar et al, 2010).
Although words such as “possibly”, “somewhat” and “barely” may not seem complicated, adverbs of likelihood and magnitude such as these are also key components of literate language, since they enable precision of thought that goes beyond simple, concrete descriptions.
Certain types of verbs also contribute to the abstract nature and linguistic specificity of written discourse. Factive and non-factive verbs, such as “know”, “realise”, “believe” and “imagine” reflect different mental states and distinguish between concepts of truth and uncertainty. Metalinguistic verbs such as “assert”, “imply” and “concede”, as well as metacognitive verbs such as “hypothesise”, “infer” and “doubt” are also crucial for academic reasoning and constructing arguments.
On a related note, polysemous and double function words such as “cold” or “sweet” require advanced metalinguistic awareness to understand that the same word can have different meanings depending on the context. Whilst many words have a casual, everyday sense that even young children will know, academic texts frequently feature the more abstract sense which won’t be learnt until later on (Nippold, 1998).
At secondary level, adverbial conjuncts such as “consequently”, “subsequently”, “conversely”, and “ultimately” are also used increasingly (Nippold, 2016) in essays and other high level expository texts as a way of “signposting” information for the reader. These words connect ideas across sentences, rather than within sentences as conjunctions do.
Other examples of literate words include derived nominals and derived adjectives. Derived nominals are nouns formed by adding suffixes to verbs, e.g. “condensation” from condense, whilstderived adjectives come from nouns e.g. “categorical” from category. Words such as these are commonly found in subjects such as science, mathematics and English literature (Nippold, 2018).
In one study, Nippold examined a range of textbooks for the aforementioned subjects to see how often these types of words occurred. Out of a total of 16,028 words, she found 254 derived nominals and 273 derived adjectives. Although this may not seem like a huge number, she argued that they occurred often enough that any student who struggled with them could easily misinterpret key parts of the text (Nippold, 2018).
Literate language also extends beyond the lexicon to certain types of sentence structure. Written sentences tend to be longer and more densely packed with information, with subordinate clauses arranged in hierarchical rather than linear fashion to highlight importance of ideas (Balthazar et al, 2010).
According to Marilyn Nippold, these two features develop in tandem, in what she called the “lexicon-syntax interface” (Nippold, 2014). For example, she highlighted how the use of meta-cognitive verbs drives the use of nominal clauses, e.g. “she assumed that he would arrive” (Nippold, 2014). Elaborated noun phrases are also commonly used in subjects such as science to introduce specialist vocabulary, e.g. “sedimentary rocks, layers of compacted sand and marine shells, are formed over millions of years” (Balthazar et al, 2010).
To reiterate, most children gradually develop an awareness of literate language features through repeated exposure to and engagement with complex written and instructional materials. Whilst young children tend to learn new words orally through informal conversation, this shifts around the fourth year of primary school (Nippold, 1998), as they move from the “learning to read” to the “reading to learn” stage.
Older school children learn new words in three main ways: through direct instruction of curriculum vocabulary in their lessons, as well as employing the metalinguistic strategies of contextual abstraction and morphological analysis to their own independent reading (Nippold, 2018). These strategies entail working out the meanings of new words encountered in text from the context and from their constituent parts, respectively.
Learning new words in this way requires not only metalinguistic awareness and knowledge of a range of different root words and affixes, but also a substantial amount of time spent reading challenging texts on a regular basis (Nippold, 2018). Research has found that active, proficient and motivated readers who are interested in a wide range of topics develop much larger vocabularies than struggling readers. (Nippold, 1998).
Unfortunately, students with language disorders often fall into the latter category; many struggle to read at a basic level, or to understand what they read (Nippold, 2018). What’s more, those who did not manage to establish a solid basis in oral language skills earlier on in their schooling will have enormous difficulty engaging with more challenging literate language (Benson, 2009).
Students with language disorders also tend to be less strategic learners (Nippold, 2018), with poorer metacognitive and metalinguistic awareness. Whilst this makes them less likely to use the aforementioned strategies, metalinguistic awareness is also intertwined with literate language on a deeper level, since words are chosen carefully to reflect nuances in meaning (Benson, 2009).
Difficulties with literate language may appear subtle compared to more obvious oral language deficits. However, familiarity with this style is vital for academic success (Benson, 2009), and any difficulties will affect students’ ability to understand explanations in lectures and textbooks, to write essays and reports, and engage in debates. Ignorance of certain types of words such as derived nominals and adjectives may also hinder success in STEM related subjects and access to those fields (Nippold, 2018).
For more information about the purpose and distinctive features of academic language, or “expository discourse”, please see my next post: https://secondaryschoolslt.wordpress.com/2026/04/15/what-is-expository-discourse-and-how-is-it-relevant-at-secondary-school/
Notes
Balthazar, Catherine H., and Cheryl M. Scott. “The Grammar of Information: Challenges for Older Students with Language Impairments.” Topics in Language Disorders 30, no. 4 (2010): 313–327.
Benson, Susan E. “Understanding Literate Language: Developmental and Clinical Issues.” Contemporary Issues in Communication Science and Disorders 36 (Fall 2009): 174–78.
Nippold, M.A. (1998) Later language development: The school-age and adolescent years. 2nd ed. Austin, TX: Pro-Ed.
Nippold, Marilyn. (2014). Language Intervention at the Middle School: Complex Talk Reflects Complex Thought. Language, Speech, and Hearing Services in Schools. 45. 153-156. 10.1044/2014_LSHSS-14-0027.
Nippold, Marilyn A. “Back to School.” Language, Speech, and Hearing Services in Schools 47, no. 4 (2016): 269–71.
Nippold, Marilyn A. “The Literate Lexicon in Adolescents: Monitoring the Use and Understanding of Morphologically Complex Words.” Perspectives of the ASHA Special Interest Groups 3, no. 1 (2018): 211–221.
Rubin, Donald L. “Divergence and Convergence between Oral and Written Communication.” Topics in Language Disorders 7, no. 4 (1987): 1-18.
Thoughts of a secondary school SLT 