When Fluency Misleads Us

by Amanda Archbald

There are pupils in every school who unsettle our assumptions.

They speak confidently. They participate. They follow instructions, at least on the surface. There is nothing immediately concerning when you hear them contribute to a discussion. Yet, when you read their work, something does not align.

Their writing lacks control. Vocabulary is limited. Sentence structures are repetitive or incomplete. Spelling errors are persistent and, at times, surprisingly basic for their age. Progress feels slow, despite effort.

These pupils are often described in familiar ways. Careless. Lazy. Average. Or, more generously, “trying their best but not quite getting there”.

From a language perspective, those explanations are insufficient.

What sits beneath this pattern is often a gap that has gone unrecognised for years. Not because it is invisible, but because we have been looking in the wrong place. We have been listening to fluency and assuming proficiency.

In international contexts, this becomes more complex. Increasingly, we are seeing pupils who appear monolingual. English is their dominant, sometimes only, functional language. Their heritage language is limited or absent. Families, often with the best intentions, prioritise English at home to support schooling. Yet these pupils present with patterns that resemble multilingual learners who have not fully developed academic language.

So what are we looking at?

Not EAL in the traditional sense.
Not ALN in the diagnostic sense.

What we are seeing is incomplete language development.

These pupils have developed enough English to function socially and navigate school routines. But they have not developed the depth of vocabulary, grammatical control, or linguistic flexibility required for academic success. At the same time, they do not have a strong foundation in another language to support transfer.

They sit between categories. As a result, they are often unsupported.

A more precise approach is to focus on language as a barrier to learning and to determine the level of language support required.

Where is language limiting access?
What does the data tell us?
What does their work show us over time?

Some pupils will require consistent, language-aware teaching within the classroom. Others will need structured scaffolding. A smaller group will require targeted intervention focused on developing academic language.

The pupil who speaks confidently but writes poorly does not need basic English.

They need explicit teaching of how language works in academic contexts. They need to be shown how to build sentences, how to use precise vocabulary, how to structure ideas in writing, and how to read complex texts with understanding.

This is not an add-on. It is central to teaching.

The challenge, and the opportunity, for leaders is to shift how this is understood across a school.

If fluency continues to be mistaken for proficiency, these pupils will remain overlooked. If language is seen as the responsibility of a single department, provision will remain fragmented. If data is not interpreted through a language lens, intervention will remain inconsistent.

So the question I am increasingly asking is this:

Who are the pupils in your school who sound fluent, but cannot yet access the curriculum independently?

And more importantly,

What are you doing to support them?