Dyslexia Assessment and Support: What Teachers Need to Know
Learn about dyslexia assessment processes, screening tools (LASS, CTOPP, PhAB, DEST), formal diagnosis pathways, exam access arrangements.
What is a test for Dyslexia?
Dyslexia is a language-based learning disability that affects a person's reading skills. It is among the most common learning disabilities, frequently co-occurring with other conditions such as attention deficit hyperactivity disorder or visual processing difficulties. When dyslexia remains undiagnosed, individuals may face problems ranging from low self-esteem and poor language abilities to lifelong reading difficulties and low academic performance. After diagnosis, children and adults with this condition can access accommodations in school, at home, and in the workplace through comprehensive dyslexia identification and support.
This could help them reframe classroom challenges and provide them with life-long learning strategies. In a Year 4 classroom, a teacher might notice that a pupil who gives brilliant verbal answers consistently produces written work full of spelling errors and reversed letters. That pattern, repeated over weeks, is precisely the kind of observation that triggers the assessment pathway described in this guide. We begin by focusing on tests for dyslexia and getting a formal diagnosis. Rob Potts then provides practical advice and wisdom accumulated over years of specialist teaching.
Key Takeaways
- Early and accurate identification of dyslexia is paramount for effective intervention. Research consistently demonstrates that early identification, particularly of phonological processing difficulties, significantly improves long-term literacy outcomes for pupils with dyslexia (Snowling & Hulme, 2011). Teachers' awareness of early signs is crucial to initiate timely assessment and prevent secondary emotional and academic difficulties.
- A comprehensive dyslexia assessment evaluates a range of cognitive and linguistic skills, not just reading ability. Effective diagnosis moves beyond surface-level reading difficulties to explore underlying cognitive profiles, such as phonological awareness, rapid naming, and working memory, which are core deficits in dyslexia (Frith, 1999). This detailed understanding allows for the development of highly individualised and targeted support strategies.
- Effective support for pupils with dyslexia requires evidence-based interventions tailored to their specific learning profile. Following diagnosis, support should incorporate structured, multisensory phonics instruction and strategies to develop metacognitive skills, as recommended by leading educational reports (Rose, 2009). Such targeted interventions are essential for addressing core difficulties and fostering independent learning.
- Teachers are pivotal in the early recognition of dyslexia and in implementing effective classroom support strategies. Their daily observations of persistent literacy difficulties and understanding of a pupil's strengths and weaknesses are vital for initiating the assessment process and for providing differentiated instruction and accommodations (Elliott & Grigorenko, 2014). This proactive role ensures pupils receive timely support and access appropriate learning adjustments.
Types of Dyslexia Assessment
Dyslexia assessment falls into two broad categories: screening and diagnostic assessment. These serve different purposes, involve different professionals, and carry different weight in securing support. Understanding which type your pupil needs, and when, prevents wasted time and ensures the right intervention begins as early as possible.
Screening is a quick, relatively inexpensive process designed to identify pupils at risk of dyslexia. Classroom teachers, SENCOs, or trained teaching assistants can administer most screening tools. A screening result does not constitute a diagnosis, but it provides evidence to support a referral and can trigger targeted classroom interventions immediately. For example, a Year 2 teacher might use the Dyslexia Early Screening Test (DEST-2) during the autumn term to flag pupils who need closer monitoring alongside their phonics screening results.
Diagnostic assessment is a comprehensive evaluation carried out by a qualified professional, typically an educational psychologist or a specialist teacher holding a Level 7 Assessment Practising Certificate (APC). This assessment examines cognitive processing, phonological awareness, reading accuracy and fluency, spelling, working memory, and processing speed. The results produce a detailed profile of strengths and weaknesses that informs intervention planning and, where appropriate, supports applications for an Education, Health and Care Plan (EHCP).
Who can diagnose dyslexia? In England and Wales, only an educational psychologist or a specialist assessor with an APC can provide a formal diagnosis. GPs, classroom teachers, and SENCOs cannot diagnose dyslexia, though their observations and screening data form a critical part of the referral evidence. Some local authorities provide free educational psychology assessments through their SEN teams, while others require schools to commission private assessments. Waiting times vary considerably, from a few weeks in well-resourced authorities to over a year in others.
Common Dyslexia Tests Used in UK Schools
UK schools draw on a range of standardised screening and assessment tools. Each measures different aspects of reading-related cognition, and the choice depends on the pupil's age, the purpose of the assessment, and who will administer it. The table below compares the most widely used instruments.
| Test | Age Range | What It Measures | Who Administers | Approximate Cost |
|---|---|---|---|---|
| LASS (Lucid Assessment System for Schools) | 4 to 15 years | Phonological awareness, memory, phonic decoding, visual-verbal integration | Teacher or SENCO (computer-based) | £400 to £600 for site licence |
| CTOPP-2 (Comprehensive Test of Phonological Processing) | 4 to 24 years | Phonological awareness, phonological memory, rapid naming | Educational psychologist or specialist teacher | £250 to £350 for test kit |
| PhAB-2 (Phonological Assessment Battery) | 5 to 11 years | Alliteration, rhyme, spoonerisms, naming speed, fluency | Teacher, SENCO, or specialist | £200 to £300 for test kit |
| DEST-2 (Dyslexia Early Screening Test) | 4.5 to 6.5 years | Rapid naming, bead threading, postural stability, phonological discrimination, rhyme | Teacher or SENCO | £120 to £180 for test kit |
| WRIT (Wide Range Intelligence Test) | 4 to 85 years | Verbal and visual intelligence, general cognitive ability (used alongside reading tests) | Educational psychologist | £300 to £450 for test kit |
In practice, most schools begin with LASS or DEST as a screening tool, then refer to an educational psychologist who uses CTOPP-2, PhAB-2, or a broader cognitive battery for formal diagnosis. A Year 3 SENCO might run LASS across all pupils flagged by classroom teachers, then use those results to build a case for educational psychology referral for the pupils showing the strongest indicators.
What a Dyslexia Assessment Involves
A formal dyslexia assessment is not a single test but a structured sequence of activities designed to build a complete picture of how a pupil processes language. Understanding this process helps teachers prepare pupils and gather the right evidence beforehand.
Step 1: Background information gathering. The assessor reviews school records, teacher observations, previous screening results, and family history. Teachers should prepare a portfolio of evidence including dated work samples showing spelling patterns, reading records, and notes on the pupil's response to previous interventions. A Year 5 teacher might compile six months of spelling tests showing persistent letter reversals alongside phonics intervention logs.
Step 2: Cognitive processing tests. The assessor measures working memory, processing speed, and verbal reasoning. These tests establish whether the pupil's reading difficulties exist alongside otherwise typical cognitive abilities, which is a hallmark of specific learning difficulties like dyslexia.
Step 3: Phonological processing assessment. This is the core of dyslexia identification. The assessor tests phoneme segmentation, blending, deletion, and substitution. They also measure rapid automatised naming (RAN), which assesses how quickly the pupil can name familiar items such as colours, letters, or digits. Slow RAN speed is one of the strongest predictors of dyslexia (Wolf and Bowers, 1999).
Step 4: Literacy attainment testing. The assessor measures single word reading accuracy, nonword (pseudoword) decoding, reading fluency, spelling, and written expression. Comparing these scores against cognitive ability scores reveals the discrepancy pattern characteristic of dyslexia.
Step 5: Report and recommendations. The assessor produces a detailed written report identifying strengths and weaknesses, confirming or ruling out dyslexia, and recommending specific interventions and accommodations. This report forms the basis for Individual Education Plans (IEPs), provision mapping, and any applications for access arrangements in examinations.
The entire assessment typically takes two to three hours, sometimes split across two sessions for younger pupils. Results are usually available within two to four weeks.
Why do we need to test for Dyslexia?
Many adults remain undiagnosed, often asking themselves "Am I dyslexic?" after spending years dealing with otherwise unexplained reading challenges and subsequent educational, personal, or professional problems.
Although dyslexia is commonly considered a childhood condition, it can be diagnosed at any age by a qualified psychologist, learning disability specialist, or diagnostic specialist. The first step is to complete a simple dyslexia screening, then explore the results with a specialist who will determine whether the symptoms match those of dyslexia.
The physician may give a referral for more comprehensive testing carried out by specialists using a range of reading instruments and assessments including the Grey Oral Reading Test, the Woodcock-Johnson Achievement Battery, and the Lindamood Test (for phonetics and sound), among other assessments.
What does a test for dyslexia assess?
Some tests assess a child's ability to read rapidly and accurately. The same tests are used to detect dyslexia. A test for dyslexia may assess the following skills.
- Phonological awareness: Phonological processing skills are considered the foundation for reading. They make a strong predictor of reading ability in young children. Examples of tests include NEPSY-II Phonological Processing and the Sound Blending subtest of the Woodcock-Johnson III (WJ III). These tests assess how a child works with sounds in isolation. The learning specialist asks the child to segment words and blend sounds. For instance, a child may be asked to indicate what remains of the word "sit" if the first sound is removed. Or the evaluator may say "po...man" and ask the child to supply the middle sound. Younger children receive easier words, with difficulty and syllable count increasing with age.
- Decoding: Younger children may appear to be reading when they are actually memorising words rather than applying phonics principles. Two examples of formal dyslexia assessments that evaluate decoding include the Word Identification and Word Attack subtests of WJ III and the Test of Word Reading Efficiency-2 (TOWRE-2). These assess a child's ability to decode words accurately and rapidly, and to distinguish familiar words from unfamiliar ones.
- Comprehension and reading fluency: This type of diagnostic assessment evaluates language abilities by asking the child to read words in context. Some children may read at a young age but take so long to decode that they forget what they have just read. Examples include the Reading Fluency subtest of WJ III, TOWRE-2, and the Gray Oral Reading Test (GORT-5). The child reads aloud a passage and then answers questions about it. These tests assess how fluently and accurately a pupil comprehends connected text.
These are the main tests used to determine reading ability. They can also check rapid automatised naming abilities, a key predictor identified by research (Wolf and Bowers, 1999).
After Diagnosis: Support in the Classroom
A dyslexia diagnosis is a starting point, not an endpoint. The real work begins when teachers translate assessment findings into daily classroom practice. Effective support draws on structured literacy approaches, environmental adjustments, and assistive technology, all tailored to the individual pupil's profile.
Structured literacy programmes. Orton-Gillingham based approaches remain the gold standard for dyslexia intervention. These programmes teach reading through explicit, systematic, multisensory instruction. In practice, this means a Year 3 pupil working through a structured phonics programme where they simultaneously see the letter pattern, hear it spoken, trace it in sand, and write it on a whiteboard. The British Dyslexia Association recommends programmes that are cumulative, sequential, and provide sufficient overlearning opportunities.
Coloured overlays and visual stress. Some dyslexic pupils experience visual stress where printed text appears to move, blur, or shimmer. Coloured overlays placed over reading material can reduce this effect for some learners. While the evidence base is mixed (Ritchie, Sala, and McIntosh, 2011), overlays are inexpensive and non-invasive, making them worth trialling. A teacher might offer a selection of overlay colours and let the pupil choose whichever feels most comfortable for sustained reading.
Assistive technology. Text-to-speech software, speech-to-text dictation, and audiobooks can reduce the cognitive load of reading and writing tasks. Tools like Read&Write, ClaroRead, or the built-in accessibility features on iPads allow dyslexic pupils to access curriculum content at their cognitive level rather than being limited by their decoding speed. A Year 6 pupil preparing for SATs might use text-to-speech to independently access science revision materials.
Environmental adjustments. Seating the pupil away from visual distractions, providing printed handouts rather than requiring board copying, using dyslexia-friendly fonts (Arial, Comic Sans, or OpenDyslexic), and allowing extra time for reading-heavy tasks all reduce unnecessary processing demands. Scaffolding complex written tasks with graphic organisers, writing frames, and word banks helps pupils organise their ideas before tackling the mechanical demands of writing.
Funding and Access Arrangements
For pupils with diagnosed dyslexia, examination access arrangements can make the difference between results that reflect genuine understanding and results that merely reflect reading speed. The Joint Council for Qualifications (JCQ) governs access arrangements for GCSEs, A Levels, and other regulated qualifications in England.
Common access arrangements for dyslexic pupils include 25% extra time (the most frequently granted), a reader (a person who reads the exam paper aloud), a scribe (a person who writes the pupil's dictated answers), use of a word processor, and modified papers with enlarged print or specific colour backgrounds. To secure these arrangements, the school's SENCO must demonstrate that the pupil has a confirmed diagnosis, that the arrangements reflect the pupil's normal way of working in the classroom, and that there is a history of need documented over time.
JCQ requires evidence from two sources: a formal assessment report (from an educational psychologist or specialist assessor) and a "picture of need" built from teacher observations, intervention records, and internal assessment data. Schools must apply well before the examination period, typically by the autumn term of the examination year. The SENCO should begin gathering evidence at least 18 months before major examinations.
For younger pupils, schools can apply for high needs funding through the local authority to support specialist intervention programmes, one-to-one teaching assistant time, or specialist teacher sessions. An EHCP may be appropriate for pupils with severe dyslexia whose needs cannot be met from the school's own SEN budget. Teachers play a critical role in this process by providing detailed evidence of the pupil's response to previous interventions and their current level of need.
What support is available for students with dyslexia?
Identifying dyslexia early is crucial, as it allows for timely intervention and support. Here are strategies teachers can employ.
- Multi-sensory learning: Engage multiple senses (visual, auditory, kinaesthetic, tactile) in learning activities. Using sand or playdough to form letters reinforces letter-sound associations. A Year 1 teacher might set up a "phonics station" where pupils trace letters in shaving foam while saying the sound aloud.
- Structured literacy approach: Implement a structured, sequential, and explicit approach to teaching reading and spelling. Break down language into its basic components and teach them systematically. Programmes like Sounds-Write or Read Write Inc. provide this structure.
- Assistive technology: Provide access to text-to-speech software, speech-to-text software, and audiobooks. These tools help pupils bypass reading difficulties and access information more easily.
- Accommodations and modifications: Offer extra time on assignments and tests, reduced workload, preferential seating, and alternative assessment methods. Modify instruction to meet individual needs.
- Supportive classroom environment: Create a classroom that is inclusive, accepting, and supportive. Encourage pupils to ask questions, take risks, and celebrate their strengths. A teacher might share examples of successful dyslexic individuals (Richard Branson, Steven Spielberg) to build self-esteem.
- Collaboration with parents and specialists: Work closely with parents, special education teachers, and other specialists to develop and implement effective strategies. Regular communication and collaboration are essential for pupil success.
Every pupil with dyslexia is unique. By understanding these characteristics and implementing appropriate support, teachers can help dyslexic learners reach their full potential.
Recognising Early Signs of Dyslexia in the Classroom
Early identification of dyslexia relies on recognising patterns of persistent difficulties that extend beyond typical developmental variations. Key indicators include unexpected struggles with phonological awareness, such as difficulty rhyming, segmenting sounds, or blending phonemes despite adequate instruction. Pupils may exhibit slow, laboured reading with frequent hesitations, demonstrate inconsistent spelling patterns, or show marked discrepancies between their verbal comprehension and written expression. Research by Snowling and colleagues emphasises that these difficulties often persist despite responsive teaching, distinguishing dyslexia from temporary learning gaps.
Classroom observations should focus on specific literacy behaviours across different contexts. Watch for pupils who consistently avoid reading aloud, take significantly longer to complete written tasks, or demonstrate excellent oral contributions but poor written work. Note difficulties with automaticity in word recognition, frequent letter reversals beyond age seven, or challenges remembering sight words previously learnt. Bradley and Bryant's research highlights that difficulties with rapid naming tasks, such as quickly identifying colours or objects, can also signal potential dyslexic traits.
Effective identification requires systematic documentation of observations over time rather than relying on isolated incidents. Maintain brief, dated records of specific examples, noting the context and support provided. This evidence-based approach enables meaningful discussions with SENCOs and supports referral decisions while ensuring appropriate differentiated classroom interventions begin promptly.
Effective Teaching Strategies for Dyslexic Pupils
Effective teaching strategies for dyslexic pupils centre on structured, multisensory approaches that reduce cognitive load whilst building literacy skills systematically. Orton-Gillingham based methods, which incorporate visual, auditory, and kinaesthetic learning pathways simultaneously, have demonstrated consistent success. Teachers should present new information in small, sequential steps, allowing pupils to master each component before progressing to more complex tasks.
Classroom accommodations must address the specific processing differences that characterise dyslexia. Extended time for reading and writing tasks is essential, as is providing alternative ways to demonstrate knowledge, such as oral presentations or mind maps. John Sweller's cognitive load theory demonstrates why dyslexic pupils benefit from reduced extraneous information on worksheets, clear fonts like Arial or Comic Sans, and consistent formatting across materials.
Daily implementation should include explicit phonics instruction, regular opportunities to overlearn key concepts, and immediate, positive feedback. Teachers can support dyslexic pupils by providing advance organisers for lessons, using colour-coding for different types of information, and ensuring instructions are given both verbally and visually. Creating a classroom environment where mistakes are viewed as learning opportunities helps build the confidence these pupils need to take literacy risks and develop their skills progressively.
When and How to Refer for Dyslexia Assessment
Teachers should consider referring pupils for dyslexia assessment when persistent literacy difficulties remain evident despite high-quality, structured teaching and targeted interventions over a period of at least 6 to 12 weeks. Key indicators include significant gaps between oral language abilities and reading or writing performance, ongoing difficulties with phonological processing, and challenges that appear disproportionate to general cognitive abilities. Rose's 2009 review emphasises that early identification is crucial, as timely intervention can substantially improve outcomes.
For further reading on this topic, explore our guide to Read Write Inc.
The referral process typically begins with comprehensive documentation of the pupil's difficulties, interventions attempted, and their responses to support. Teachers should gather evidence including reading and spelling assessments, samples of written work, and observations of learning behaviours across different contexts. This evidence base supports educational psychologists or specialist teachers in conducting formal assessments. Most local authorities require schools to demonstrate that they have implemented appropriate classroom adjustments and targeted support before proceeding with statutory assessment.
Collaboration with parents and the school's SENCO is essential throughout this process. Teachers should maintain detailed records of interventions and progress, as this information directly informs assessment decisions and subsequent provision mapping. The timeline from initial concern to formal assessment varies, but early communication with families and systematic record-keeping can significantly streamline the process.
Collaborating with Families
Effective collaboration between teachers and families forms the cornerstone of successful support for dyslexic pupils. Research by Reid and Fawcett emphasises that when parents and educators work together using consistent approaches, pupils demonstrate significantly improved literacy outcomes and enhanced self-confidence. This partnership requires open communication about the child's specific needs, regular sharing of strategies that work in both environments, and mutual understanding of the challenges dyslexic learners face.
Practical collaboration begins with structured communication systems that keep families informed about classroom interventions and assessment findings. Teachers should provide parents with clear explanations of evidence-based strategies being used in school, such as multisensory phonics approaches or assistive technology tools. Equally important is gathering insights from families about successful home strategies, preferred learning times, and emotional responses to literacy tasks.
Regular review meetings should focus on celebrating progress whilst addressing ongoing challenges collaboratively. Teachers can support families by sharing specific techniques for homework support, recommending structured reading programmes, and providing guidance on managing frustration during home learning. When families understand the rationale behind classroom accommodations and feel equipped to reinforce these approaches at home, dyslexic pupils benefit from consistent support that accelerates their literacy development.
Conclusion
Understanding dyslexia assessment and the support systems available is paramount for educators. By recognising the signs early, employing appropriate screening and diagnostic methods, and implementing tailored support strategies, teachers can significantly impact the academic and personal development of dyslexic pupils.
A dyslexia diagnosis is not a barrier to success. With the right support and encouragement, pupils with dyslexia can thrive and achieve their goals. Teachers should focus on developing a toolkit of evidence-based strategies: multisensory teaching methods, additional processing time, assistive technology, and breaking complex tasks into manageable steps. Regular monitoring and adjustment ensures support remains responsive to individual needs.
Successful support also requires ongoing professional development and collaboration. Teachers benefit from attending training on dyslexia awareness, engaging with educational psychologists during the assessment process, and sharing effective practices with colleagues. Building strong partnerships with parents and maintaining open communication channels helps create consistent support structures between home and school.
The goal is to create an inclusive classroom culture where literacy development is supported through structured approaches that benefit all learners. When teachers are equipped with the knowledge to identify, assess, and support dyslexic pupils effectively, they create educational environments where every child can thrive academically and develop a positive relationship with learning.
Frequently Asked Questions
What is the difference between dyslexia screening and a formal diagnosis?
Screening identifies pupils at risk and provides early evidence for interventions. A formal diagnosis is a comprehensive evaluation by an educational psychologist or specialist teacher with an Assessment Practising Certificate. Only a diagnostic assessment confirms dyslexia and supports formal applications for an Education, Health and Care Plan.
How do teachers implement dyslexia support in the classroom?
Teachers can use evidence-based strategies such as multisensory learning and coloured overlays to help pupils access the curriculum. Providing assistive technology and allowing for extra time in assessments are also common methods. Staff should regularly practise these techniques to ensure they meet the specific needs of every learner.
What are the benefits of early dyslexia identification for learning?
Early identification allows teachers to provide targeted support before a child experiences frustration or challenging behaviour due to learning difficulties. It helps schools implement specific literacy interventions that address phonological processing weaknesses during the early years. Identifying needs sooner also reduces the waiting time for formal assessments and access to specialist resources.
What does the research say about effective dyslexia interventions?
Research suggests that structured, cumulative, and multisensory phonics programmes are most effective for learners with dyslexia. Studies also highlight the importance of addressing working memory and processing speed through differentiated instruction. Evidence shows that small-group interventions can lead to significant improvements in reading accuracy.
What are common mistakes when assessing dyslexia in the classroom?
One common mistake is relying solely on reading tests while ignoring phonological awareness and rapid naming assessments. Teachers may also wait too long to involve the SENCO, which delays the identification process. It is also a mistake to assume that a screening result is a formal diagnosis, as these tools only indicate a level of risk.
Which dyslexia screening tools are commonly used in UK schools?
Many UK schools use computer-based systems like the Lucid Assessment System for Schools to identify phonological memory and phonic decoding issues. The Dyslexia Early Screening Test is frequently used for younger pupils between the ages of four and six. These tools help staff gather data to support a referral to an educational psychologist for a full evaluation.
Further Reading
Further Reading: Key Research Papers
These studies provide the evidence base for the screening tools and intervention approaches described in this guide.
Identifying Dyslexia: A Review of the Evidence View resource ↗
British Dyslexia Association
British Dyslexia Association (2024)
The BDA provides regularly updated guidance on screening tools, diagnostic pathways, and evidence-based interventions for UK schools. Their quality mark accredits programmes meeting rigorous standards for structured literacy teaching.
Identifying and Teaching Children and Young People with Dyslexia and Literacy Difficulties View report ↗
Rose Review 2009
Rose, J. (2009)
The Rose Review established the UK government's working definition of dyslexia and recommended phonics-based intervention as the primary approach. It remains the foundational policy document shaping how schools identify and support dyslexic learners.
Improving Literacy in Key Stage 1 View report ↗
EEF Guidance Report
Education Endowment Foundation (2020)
The EEF's guidance report synthesises evidence on effective literacy teaching, with specific recommendations for pupils struggling with reading. The report grades intervention approaches by strength of evidence and cost-effectiveness.
Dyslexia, Reading and the Brain: A Sourcebook of Psychological and Biological Research View study ↗
Oxford University Press
Snowling, M. J. (2000, updated 2019)
Snowling's comprehensive review of the biological and cognitive basis of dyslexia shaped modern understanding of phonological processing deficits. Her work underpins the assessment tools and intervention approaches used in UK schools today.
