Understanding Developmental Language Disorder

Understanding Developmental Language Disorder: the Hidden Barrier to Learning.

Most young children arrive at their first day at school curious and eager to learn. They enjoy being with other children, ask endless questions at home and are fascinated by the new world that they are entering into.

Yet for some children, once they enter the classroom, learning becomes far more difficult than it should..

Such children struggle to follow instructions, or explain their ideas clearly. Such children may not remember what the teacher has just said. Learning new alphabetic codes is a struggle. Teacher led classroom discussions move too rapidly, and classroom conversations become a swirl of noise that cannot be accessed.

Adults sometimes assume these children are distracted, unmotivated or simply not trying hard enough.

In reality, many are working harder to access classroom language and the curriculum than most people realise.

They are children with Developmental Language Disorder (DLD).

DLD is one of the most common childhood developmental disorders, affecting approximately two to three children in every typically sized classroom.

Yet despite developmental languge disorders prevalence, it remains one of the least understood barriers to learning.

Children with oral language difficulties are largely invisible. 

Fortunately, when language difficulties are recognised early and teaching is adapted properly following science of learning principles, children with oral language difficulties can make real progress and participate more successfully at school.

Understanding Developmental Language Disorder - What is DLD?

Developmental Language Disorder (DLD) is a lifelong neurodevelopmental condition that affects a child's ability to understand and/or use spoken language.

The difficulties are significant enough to interfere with all aspects of learning, disrupt social engagement and make simple everyday communication challenging.

It's important to note that children with DLD are not lazy nor ar they unintelligent.

Kids with DLD are just as curious, thoughtful and motivated as other typicall developing learners. The difficulty arises due to the reality that the way we learn about and percieve the world and make sense of our environment is filiteredl through our language systems.

Language is the gatekeeper for all children through which almost every school lesson is delivered. When that system is not working at its best learning can effectively break down.

learning becomes difficult and hard work. much harder and taxing than for typical learners. 

Some children experience greater difficulty understanding language (receptive language), while others struggle primarily to express their views and opinions (expressive language). Many experience challenges in both receptive and expressive language.

As children grow older and advance through the school system, language and academic demands only increase and the stress placed on children's oral language capabilities continue to grow.. 

Understanding Developmental Language Disorder - Why Language Matters So Much at School

Language is sometimes thought of as another subject children need to learn at school, almost as if speaking and listening were another aspect of the curriculum

It simply isn't.

Language is the medium through which all learning is taught and impacts every subject from Englisn to Maths to Science to Physical Education.

A child in a classroom uses receptive otal language to understand teacher instructions while learning new vocabulary. That child will then use her oral expressive language skills to express her views or opinions during a teacher led discussion.

Oral language is used in a variety of academic settings when students wish to:

• ask questions
• explain their thinking and reasoning
• solve mathematical problems that narrate a scenario
• participate actively or passively in classroom discussions
• understand stories and comprehend information texts
• write sentences, paragraphs and reports using written language skills
• develop relationships and friendships with peers and teachers.

This tells us unambiguously that language difficulties affect much more than speaking and listening skills, .they influence all aspects of learning across the entire curriculum.

As children move through the school, from early years classrooms, through the middle primary school years and into secondary school language becomes increasingly abstract, precise and sophisticated.

Lessons rely less on concrete experiences and increasingly make demands that require children to listen closely, interpret complex information, infer the hidden meaning in text, and explain.their reasoning.

For children with DLD, these increasingly complex and challenging language demands create an invisible barrier to learning.

Understanding Developmental Language Disorder - The Role of Decontextualized Language

Young children learn much of their early language within meaningful, everyday experiences.

A parent might say,

"Can you put the spoon in the drawer?"

The child is surrounded by real objects, familiar routines and immediate feedback.

Language is supported by context.

Speech pathologists sometimes describe this as contextualised language.

School introduces something quite different: an oral language of a much more complex form.

Children are suddenly expected to learn through decontextualised language.

This is language that exists independently of the immediate situation.

Instead of talking about objects they can see and touch and are intimately familiar with, children are now asked to discuss ideas, compare concepts, predict outcomes and explain events, often from text that may have happened yesterday, last century or on the other side of the world.

Let's return to our Where the Wild Things Are reference.

A teacher might ask,

"Why do you think Max changed his mind and wanted to leave the Island?"

or

"Why did the creatures on the Island not want Max to leave?."

Neither question can be answered by the child simply looking around the room.

In fact, for this child to answer the question, "Why did the creatures on the island not want Max to leave?" a child must coordinate several language systems at the same time.

The child needs to remember what happened earlier in the story, and comprehend vocabulary words such as lonely, king, belong and leave.

The student also needs to connect events across the story. Rather than simply recalling a fact, the student must infer that the Wild Things wanted Max to stay because they lenjoyed having him as their king.

This type of probing inferential question prompts the child to draw upon oral language, vocabulary, background knowledge, working memory, inferencing, and reasoning - all simultaneously.

For children with typically developing oral language skills, this coordintion of thinking skills occurs naturally. For children with DLD, this rapid coordination of varied skills can quickly break down. 

And the gap between conversational language and classroom language only widens every year.

Children with DLD are often working incredibly hard simply to keep up with the conversation before they can even begin thinking about the lesson itself.

Children with Developmental Language Disorder (DLD) often work incredibly hard simply to keep up with classroom language before they can begin thinking about the lesson itself.

Unlike the highly contextualised language of home, which is supported by familiar routines, shared experiences, and visual cues, classroom language is increasingly decontextualised, relying on abstract vocabulary, complex sentences, and ideas beyond the here and now.

As a result, children with DLD are often attempting to process the teacher's words while their peers are already engaging with the learning.

Understanding Developmental Language Disorder - Through a Child's Eyes

The classroom has only been running for five minutes.

The teacher says,

"Take out yesterday's writing book, finish the last paragraph, then compare your ideas with your partner before we discuss today's lesson."

Around the room, chairs scrape backwards.

Books open.

Pencils appear.

Everyone seems to know exactly what to do.

You don't.

You heard the teacher.

At least, you think you did.

You remember the words writing book.

Then partner.

Everything in between is gone.

Should you start writing?

Are you supposed to talk to someone before you begin?

You look around the room.

The other children have already started.

You quietly copy what the student beside you is doing, not sure if it is the right thing, hoping not to be noticed.

And it isn't that you were not listening.

You were trying to make sense of the teacher's words that arrived too fast.

By the time you've worked out what to do, the lesson has already moved on.

Understanding Developmental Language Disorder - What Might Parents and Teachers Notice?

Because language difficulties are largely invisible, adults often notice more the consequences of a child's difficulty understanding language and using language rather than the underlying cause.

Every child is different and unique, but children with DLD commonly:

Find it difficult to follow spoken instructions

Long or multi-step instructions can quickly become overwhelming, particularly when several pieces of information are presented together.

Know more than they can explain

Many children understand much more than they are able to express. Spoken answers are often brief, incomplete or lack the detail needed or intended to communicate.

Have difficulty learning new vocabulary

New words take longer to learn, require more repetition and are sometimes forgotten more quickly than expected.

Struggle to understand stories and new information

Children with DLD may recall isolated facts but find it difficult to identify the main idea, understand cause and effect, make predictions or infer information that has not been stated directly.

Experience difficulty with reading and writing

Reading comprehension, written expression and learning from textbooks all rely heavily upon oral language. As classroom language becomes increasingly sophisticated, literacy often becomes more difficult.

Find social conversations challenging

Understanding jokes, figurative language, sarcasm or subtle conversational cues may require considerable effort. Some children become quiet observers, while others misunderstand social situations without intending to.

None of these characteristics, on their own, indicate DLD.

However, when several occur together and persist over time, further assessment by a speech pathologist is recommended.

Understanding Developmental Language Disorder - Identifying DLD

Children with DLD are often first identified by parents or classroom teachers who notice that language development is not progressing as expected.

Assessment involves much more than administering a standardised test.

A speech pathologist will usually consider:

• the child's understanding and use of spoken language
• classroom participation
• conversations with parents and teachers
• learning history
• literacy development
• functional communication during everyday activities.

Standardised oral and written language assessments provide valuable information, but they represent only one part of the overall picture.

The most important question is not simply,

"How did the child score on receptive and expressive subtests?"

It is,

"How is this child's language affecting participation, learning and everyday communication?"

What the research tells us

Research consistently shows that oral language forms the foundation for later literacy and academic learning.

Children learn through language long before they learn about language.

We know this:

• Vocabulary knowledge supports both oral and reading comprehension.
• Grammar supports both speaking and written language.
• Listening comprehension contributes directly to understanding classroom teaching and academic learning
• Narrative skills support both oral communication and written expression.

When language difficulties remain unidentified, they influence learning across multiple curriculum areas rather than a single subject.

The encouraging news is that children with DLD can make meaningful progress when language is taught explicitly, systematically and repeatedly with the appropriate level of intensity.

We need children with DLD to experience thousands of successful opportunities to understand and use language in meaningful contexts.

Understanding Developmental Language Disorder - Supporting Children with DLD

There is no single strategy that helps every child.

Instead, successful intervention usually combines support from teachers, parents and speech pathologists.

Children with DLD benefit when adults:

• teach new vocabulary explicitly
• explain unfamiliar concepts using visual supports and examples
• model complete sentences and rich language
• provide opportunities for guided practice before expecting independent performance
• revisit important concepts regularly
• encourage discussion through high-quality shared reading reduce unnecessary language complexity without reducing intellectual challenge.

Small adjustments, consistently applied, can have a large impact.

Perhaps the greatest gift adults can provide is patience.

Children with DLD are rarely unwilling learners.

More often, they are learners working harder than anyone realises.

Understanding Developmental Language Disorder - Looking Ahead with Confidence

Developmental Language Disorder does not define a child's potential in school and life.

Children with DLD become successful adults, complete university degrees, build careers, develop strong friendships and contribute meaningfully to their communities.

Their journey may simply require language to be taught more deliberately and explicitly than it is for many of their peers.

As parents, teachers and speech pathologists, our role is to create environments where language is made visible, learning is made accessible and every child has the opportunity to participate with peers, important adults and the curriculum with confidence.

When we  better understand the impact of language, we begin to have a new appreciation for learning.

Where to next?

If you wish to learn more about specific aspects of Developmental Language Disorder, explore the following pages:

• Shared reading – One of the most powerful ways to develop oral language.
• Working memory – Why children sometimes appear distracted when the real difficulty is remembering language.
• Vocabulary development – How children learn, remember and use new words.
• Syntax and Grammar – Why sentence structure underpins both speaking and writing.
• Assessment – How speech pathologists identify language difficulties.
• Evidence-based intervention – Practical approaches that improve language learning at home and at school.

Return from Understanding Developmental Language Disoerder to What is Oral Language

References

Paul, R., Courtney Frazier Norbury, & Carol Gosse. (2018). Language disorders from infancy through adolescence: Listening, speaking, reading, writing, and communicating (5th ed.). Elsevier

Wallach, G. P. (2008). Language intervention for school-age students: Setting goals for academic success. Mosby Elsevier

All images on this webpage were developed via chatGPT OpenAI with an iterative process

Updated 06/2026