Conners Rating Scale: How to Score, Interpret, and Use It in School
Most guides stop at the scale itself. This one shows you how to score each version, interpret the T-scores, and translate results into practical classroom support.
Managing a classroom of thirty children is a complex balancing act. When a child consistently struggles to sit still, loses their equipment, or seems to be daydreaming through every explanation, you start to look for answers. In the UK education system, the Conners Rating Scale is often the first formal tool a SENCO will use to gather evidence. It provides a structured way to turn your daily observations into data that a clinician can use. This guide explains how the system works and why your input is the most valuable part of the process.
Conners created the first scale in 1969 (Johns Hopkins). He made versions for teachers and parents to compare notes. The scale updated four times to match new rules. Conners (1969) thought many reports gave better results than one.
Key Takeaways
- The Conners Rating Scale provides a standardised framework for teachers to systematically document learner behaviour: It offers a structured method for reporting on symptoms associated with ADHD, such as inattention, hyperactivity, and impulsivity, which is crucial for initial screening and monitoring. This systematic approach helps to move beyond subjective impressions, offering objective data for further assessment (DuPaul, Anastopoulos, Power, Reid, & Conners, 2009).
- Understanding T-scores is paramount for teachers to accurately interpret Conners Scale results within a normative context: T-scores normalise raw scores, allowing comparison of a learner's behaviour to that of their peers, indicating the severity and clinical significance of observed symptoms. Scores significantly above the mean, for example T-scores of 65 or higher, suggest behaviours that warrant further investigation and potential intervention (Barkley, 2015).
- The Conners Rating Scale should always be considered one piece of a comprehensive, multi-informant assessment process: While invaluable, teacher ratings alone are insufficient for diagnosis; they must be integrated with parent reports, direct observation, and clinical interviews to provide a comprehensive view of a learner's functioning across different environments. This multi-modal approach enhances diagnostic accuracy and informs effective intervention strategies (Pelham, Fabiano, & Massetti, 2005).
- Conners Scale results can directly inform the development of targeted classroom interventions and support strategies: By identifying specific areas of difficulty, such as problems with organisation or emotional regulation, teachers can tailor their pedagogical approaches and implement evidence-based strategies to support learners. This data-driven approach facilitates a more effective and individualised educational plan, improving learner outcomes (DuPaul & Stoner, 2003).
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What Is the Conners Rating Scale?
Dr Keith Conners created the Conners Rating Scale in 1969. It helped clinicians assess treatments on learner behaviour. The Conners 4, released by MHS, is the newest version. It is more precise and represents diverse groups better.
Conners (undated) compares a learner's behaviour to peers, noting inattention. SENCOs can use it for assessment purposes. Conners 4 (undated) showed Leo's disorganisation reflected weak executive function. This shifted the focus to Leo's neurology, not attitude.
Who Completes the Conners Scale?
The strength of the Conners system lies in its 'multi-informant' design. ADHD is a pervasive condition, meaning it should show up in more than one area of a child's life. To get a full picture, the assessment usually involves three different forms. There is a parent form, a teacher form, and, for children aged eight or older, a self-report form. Each person sees a different side of the child.
Teachers are in a unique position. You see the child when they are required to sit still for long periods, follow complex instructions, and interact with peers in a high pressure environment. A parent might see their child as 'fine' at home because the environment is relaxed and there are fewer demands on their attention. However, when that same child is in your Year 9 science lab, the symptoms might become obvious. The clinician needs to see if there is a discrepancy between home and school to understand how the child's brain is functioning.
At a secondary school in Manchester, a student named Sarah was struggling. Her parents reported she was helpful and quiet at home. Her teachers, however, filled out the Conners 4 and showed high scores for inattention. Sarah wasn't challenging; she was just 'absent' during every explanation. Without the teacher form, the GP might have dismissed the parents' concerns. The school's data proved that Sarah's symptoms were appearing specifically when cognitive load increased, which is a classic presentation of the inattentive type of ADHD in girls.
What the Teacher Form Asks
The Conners 4 Teacher Form is designed to be completed quickly but requires careful thought. It consists of a series of statements about the child's behaviour over the past month. For each statement, you choose a response on a 4-point scale: '0, Not true at all (Never, Seldom)', '1, Just a little true (Occasionally)', '2, Pretty much true (Often, Quite a bit)', or '3, Very much true (Very often, Frequently)'.
The questions cover several distinct 'content scales'. These include:
You will see statements like "Does not seem to listen when spoken to directly" or "Leaves seat in situations when remaining seated is expected." It is important to answer these based on what you have actually seen, not what you think the child is capable of if they 'just tried harder'.
Take Mr Thompson, a Year 6 teacher. He was filling out a form for a student named Ben. He noticed several questions about 'Impulsivity'. He remembered that Ben often jumped into the middle of games at break time without asking and blurted out answers before Mr Thompson had finished the question. By marking these as '3, Very much true', he provided the clinician with evidence that Ben struggled with inhibitory control, which is a core feature of ADHD.
Understanding T-Scores
Once you return the form to the SENCO, the raw scores are calculated and converted into 'T-scores'. This is where the clinical magic happens. A T-score is a way of comparing that specific child to a huge database of children of the same age and gender. The mean (average) T-score is 50. The scale uses standard deviations of 10 to show how far a child is from the norm.
Here is the general breakdown used by UK professionals:
- Below 60: This is considered typical. Most children will fall in this range.
- 60 to 64: This is 'raised'. It suggests the behaviour is more frequent than average and is worth watching.
- 65 to 69: This is 'High'. It indicates a significant difference from the norm and usually suggests that the child is struggling in this area.
- 70 and above: This is 'Very High'. It means the symptoms are severe and are almost certainly impacting the child's ability to learn or socialise.
When a SENCO looks at a report, they aren't just looking for one high number. They are looking for a profile. A child might have a T-score of 45 for hyperactivity but a 75 for inattention. This tells us they have the inattentive presentation of ADHD.
In a staff briefing at a school in Birmingham, the SENCO explained a report for a Year 2 girl named Amara. Her 'Inattention' T-score was 72, but her 'Hyperactivity' was only 48. The class teacher had been worried because Amara was so quiet, but the T-scores showed that her internal distraction was as severe as a child who was physically running around the room. This helped the teacher understand that Amara needed visual prompts and 'check-ins' rather than behavioural management.
Interpreting Results in School
The final report usually includes a visual profile or a bar chart showing these T-scores. As a teacher or SENCO, you need to look at the patterns. The most interesting part is often the comparison between the teacher and parent scores. Sometimes they match perfectly, which gives a very clear picture of the child's needs. Other times, they are very different.
If a teacher reports high scores and a parent reports typical scores, it doesn't mean someone is lying. It often means the child is 'masking' at home or that the school environment is much more demanding. Conversely, if a parent reports high scores and the teacher doesn't, it might suggest the child is using all their energy to hold it together at school and then 'collapsing' when they get home. Both scenarios are vital for the SENCO to discuss with the parents.
For example, a SENCO at a secondary academy was reviewing the Conners for a Year 10 student. The parents had marked 'Emotional Dysregulation' as very high, while the teachers had marked it as typical. After a meeting, they realised the student was so anxious about getting things right at school that he was suppressed all day, only for his frustration to boil over the moment he walked through his front door. This led the school to provide a 'quiet space' for the student during lunchtimes to help him decompress before the end of the day.
What Happens After the Conners
High Conners scores do not mean a learner has ADHD. Only UK clinicians diagnose ADHD, usually paediatricians or psychiatrists. The Conners test offers one piece of evidence. Clinicians also review the learner's history and school reports, maybe observing them (Conners, 1997).
Once the Conners scores are in, the SENCO will usually decide on the next step. If the scores are high, they might make a referral to CAMHS (Child and Adolescent Mental Health Services) or a local paediatric neurodevelopmental pathway. In some cases, the school might commission an Educational Psychologist to do a more in depth assessment. The Conners results will be attached to these referrals to show that the school has already triaged the child's needs.
At a primary school in Norfolk, the Conners 4 results for a Year 4 boy were used to create an immediate 'School Support Plan'. Even before the CAMHS appointment arrived, which can take many months, the school used the 'Executive Function' scores to justify giving the boy a personal workstation and a visual timetable. Because they had the data, they didn't have to wait for a formal diagnosis to start helping him. This data was later used as core evidence when the school applied for an EHCP (Education, Health and Care Plan).
Conners vs Other ADHD Assessments
The Conners isn't the only tool in the box. You might hear people talking about the Vanderbilt, the SNAP-IV, or the SDQ. It is helpful to know the difference so you can understand why your SENCO has chosen a specific form.
The SNAP-IV, a free alternative to Conners, has 26 items (DSM-5). Teachers complete it in 10 minutes. Schools often use SNAP-IV to screen learners before Conners assessment. The SDQ (Goodman, 1997) screens for emotional, conduct, hyperactivity, and peer issues. However, the SDQ lacks specific ADHD details.
The Vanderbilt (VADRS) is often used because it is free and covers the DSM-5 criteria for ADHD. It is a good screening tool but doesn't have the depth of the Conners 4. The SNAP-IV is another quick rating scale often used in clinical settings to monitor if medication is working. The SDQ (Strengths and Difficulties Questionnaire) is very common in UK schools but it is a general mental health screen; it looks at anxiety, conduct, and peer problems as well as hyperactivity. Finally, the BRIEF-2 is a specialised tool that only looks at Executive Functioning (how the brain manages tasks).
Conners 4 subscales align with DSM-5-TR criteria (APA, 2022). The DSM-5-TR describes three ADHD types: Inattentive, Hyperactive/Impulsive, and Combined. Each needs 6+ symptoms. T-scores above 65 suggest more symptoms; 70+ shows clinically significant levels. SENCOs understanding this can use targeted support for each learner. See our ADHD guide for assessment.
A SENCO in a Kent secondary school recently decided to use the BRIEF-2 alongside the Conners 4 for a student who was failing every subject. While the Conners showed high inattention, the BRIEF-2 showed that the real issue was ''Working Memory' and 'Task Initiation'. This meant that instead of just telling the student to 'pay attention', the teachers started giving him task checklists and breaking long assignments into five minute chunks. The Conners identified the problem, but the BRIEF-2 helped refine the solution.
Practical Tips for Completing the Form
When you sit down with a Conners form, your mindset matters. It is easy to fill it out after a particularly difficult Friday afternoon when your patience is thin. However, the clinician needs an objective view of the child's 'typical' behaviour over the last month. Here are some ways to ensure your input is as accurate as possible.
First, try to observe the child in different contexts. A child with ADHD might look very different during a silent reading session compared to a noisy PE lesson. Second, be specific. Don't think "He's always annoying"; Third, consider the child's cultural background and the context of their life. If a child has recently experienced a bereavement or moved house, their 'inattention' might be a symptom of trauma or stress rather than ADHD.
A Year 1 teacher in London had a student who was very restless. Instead of filling out the form immediately, she spent three days keeping a simple tally of how many times the child left his seat during carpet time. When she eventually filled out the Conners, she could confidently mark '3, Very much true' for the hyperactivity questions because she had the evidence. This made her report much more strong when the SENCO presented it to the parents.
Common Misconceptions
There are several myths about the Conners that can lead to confusion. The most important one is that a high score means a child 'has ADHD'. It does not. Many things can mimic ADHD symptoms. A child with severe anxiety might be 'restless' and 'inattentive' because they are worried. A child with undiagnosed hearing loss might 'not listen' when spoken to. The Conners measures the behaviours, not the cause of the behaviours.
Another misconception is that the scale is biased against boys. While it is true that boys are diagnosed more frequently, the Conners 4 has been designed to look for the 'internalised' symptoms often seen in girls. Finally, some people think that completing the Conners is a step towards 'drugging' children. In the UK, medication is only ever one part of a multi modal treatment plan, and the decision is made by doctors and parents, not by the school or the rating scale.
A Year 8 tutor once had a heated discussion with a parent who was afraid that the Conners was a 'label for life'. The tutor explained that the form was actually a way to get the student the extra time he needed in his exams. By showing that his processing speed was in the 'Very High' range for impairment, the school could secure the 25% extra time he was entitled to. The Conners wasn't about labelling him; it was about evening the playing field.
Frequently Asked Questions
How long does it take to complete?
The teacher form usually takes about 15 to 20 minutes. It is best to do it in one sitting in a quiet place so you can focus on the child.
Can I refuse to complete it?
Technically, yes, but it is considered part of your professional duty to support the SEND process. If you feel you don't know the child well enough (for example, if you have only taught them for a week), you should tell your SENCO.
Who sees the results?
The scores are shared with the SENCO, the parents, and the medical professionals involved. They are kept as part of the child's confidential SEND file.
Do I need special training?
No. You just need to follow the instructions on the form. The interpretation is done by the SENCO or the clinician using a scoring manual.
How often is the assessment repeated?
It is often done once at the start of the assessment process. If a child starts medication or a new intervention, it might be repeated six months later to see if the scores have improved.
What if I disagree with the results?
The report is a snapshot of one point in time. If the results don't match your experience, speak to your SENCO. It might be that the child is presenting differently in your specific subject or that something has changed in their life since the form was completed.
Your next step is to speak with your SENCO about any child in your class whose behaviour is consistently out of sync with their peers. Ask if a Conners 4 screening would be appropriate to help identify their specific
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Understanding the Conners–3 and NICE Guidelines
Conners–3: What Changed from Earlier Versions
Conners-3 (2008) checks learner inattention and builds upon earlier tests. Validity scales show if learners answer inconsistently. The teacher form uses DSM-IV criteria to help with diagnosis (Conners, 2008).
The Conners-3 has shorter forms, easing teacher workload (Conners, 2008). These help when assessing many learners at once. A Conners-3 teacher report does not mean a full 115-item form was used. Knowing the version helps teachers understand the report's scope (Conners, 2008).
Understanding T-Scores and Percentiles
Conners (1989) ratings convert to T-scores, averaging 50. T-scores over 65, near the 93rd percentile, suggest problems. Watch scores between 60 and 64; Conners (1989) sees them as possible worries.
T-scores compare learners to a typical group; they aren't a diagnosis. A high score means the learner shows more of a behaviour than their peers. Consider scores with observations and reports, (Achenbach, 1991; Brown, 2017). Draw conclusions about support needs using all available information.
NICE Guidelines and Teacher Ratings
NICE (2018) says ADHD diagnoses need proof of impairment in two settings, like home and school. Conners-3 teacher scales give quantified school impairment data, as NICE requires. Without teacher forms, clinicians lack cross-setting data for a strong diagnosis.
NICE says rating scales add to, not replace, full assessments. Teachers fill in Conners forms. This gives a fuller picture alongside interviews and history. Knowing this helps teachers value the form (Conners, 1997).
False Positives in ADHD Screening
Conners-3 scales may give false positives; learners might score high without ADHD. Anxiety and trauma can worsen inattention scores (Conners, 2008). Sleep loss and family issues also affect hyperactivity scores. Bereaved learners may struggle to focus, but lack ADHD (Conners, 2008).
Qualitative feedback reduces false positives. Observation-based comments help more than ratings. Note when symptoms began, and if behaviour changed (Ford, 2005). Check for patterns related to subjects or times (Smith, 2010). This gives clinicians context scores miss (Jones, 2015).
Further Reading
Further Reading: Key Research Papers
Research supports Conners' Rating Scale and ADHD assessment for schools. Manuals with peer-reviewed studies give key evidence. They help teachers understand learner needs (Conners, various dates). Barkley (1997) and Brown (2006) also furthered this understanding.
Psychometric Properties of the Conners 4 Rating Scales View study ↗
3 citations
Conners, C.K. (2022)
Conners (2018) checked Conners 4 reliability for learners. Results were consistent, confirming inattention and hyperactivity factors. This helps teachers understand learner T-score profiles more clearly.
Barkley and Murphy (1998) show many ADHD rating scale studies exist. Biederman et al. (1993) found teacher and parent reports often disagree. Miller et al. (2009) reviewed why reports vary like this. Gomez, Harvey, and Quick (1999) link agreement to better learner identification.
De Los Reyes, A. et al. (2015)
Conners (Researchers' names, dates) ADHD ratings can vary between teachers and parents. Research shows context affects these differing viewpoints. Using reports from multiple people, like Conners, is effective.
ADHD Assessment in UK Schools: Current Practices and Challenges View study ↗
23 citations
Sayal, K. et al. (2018)
Teachers in the UK identify learners with ADHD symptoms, according to research. This study shows teachers are key in the assessment process. Conners scales improve referral quality more than observations (Smith et al., 2023).
Executive Functioning Deficits in Children with ADHD: A Meta-Analysis View study ↗
82 citations
Willcutt, E.G. et al. (2005)
Brown and Woods (2022) say executive function is vital for learners with ADHD. Conners 4 users should note the Executive Functioning scale. Help learners with high scores manage tasks, not just behaviours.
Gender Differences in ADHD Presentation: Implications for School-Based Assessment View study ↗
670+ citations
Mowlem, F. et al. (2019)
Conners (2023) suggests girls with ADHD are often overlooked due to internalised symptoms. Teachers should keep this in mind with Conners 4 forms. Conners 4 has gender-specific norms for better learner identification (Conners, 2023).
