How to identify ADHD in children and teens

A child who daydreams through lessons or fidgets endlessly at the dinner table isn’t necessarily inattentive or restless by choice—sometimes, their brain is simply wired to process the world differently. ADHD is one of the most common neurodevelopmental disorders in children and teens, but its signs aren’t always obvious. Many teachers and parents struggle to identify ADHD, especially when symptoms don’t fit the stereotypical image of hyperactivity.

At NextGen Psychology, we specialise in mental health assessments and support for young people and their families through ADHD diagnosis and beyond. We’re committed to early identification and intervention to provide the best possible support for a child’s academic, social and emotional wellbeing.

ADHD affects attention, impulsivity and hyperactivity, but it doesn’t look the same in everyone. While it primarily develops in childhood and adolescence, its effects can continue into adulthood. Some children are constantly moving and talking, while others may seem withdrawn, forgetful or easily distracted. These differences can make ADHD harder to recognise, especially in those who don’t fit the typical hyperactive stereotype.

There are three main subtypes of ADHD, and a child may experience symptoms from different subtypes at various stages of life. The predominantly inattentive type is often described as dreamy or distracted, with children and teens struggling to stay focused or complete tasks. The predominantly hyperactive type involves constant movement, impulsivity and difficulty staying still. The combined type includes traits of both.

For an ADHD diagnosis, symptoms must be persistent, occur in multiple settings—such as home and school—and significantly affect daily life. Occasional distraction or restlessness is normal, but when these challenges interfere with learning, friendships and self-esteem, professional assessment and support can be life-changing.

Not all children with ADHD are loud, restless, impulsive or disruptive. Many, particularly those with the inattentive subtype, are quiet and dreamy, and they often fly under the radar. They may struggle to stay engaged in lessons and frequently lose focus or drift off in their own thoughts. These children are sometimes labelled as unmotivated or underachievers rather than recognised as needing support.

A key challenge for many young people with ADHD is executive function impairment, which affects their ability to plan, organise and manage time effectively. They may forget homework, misplace belongings or take far longer than their peers to complete tasks. Even with intelligence and effort, they struggle with consistency. They might excel one day but fall behind the next, which can be frustrating for both them and their teachers. Many also experience social difficulties, struggling to read social cues or maintain friendships, while poor coordination can make tasks like handwriting or sports more challenging. Some children with ADHD display insatiability and are constantly seeking stimulation or shifting between interests, which also impedes focus.

Girls are particularly likely to be overlooked because their symptoms often don’t match the stereotypical image of the condition. Instead of being hyperactive, they may appear inattentive, disorganised or overly chatty. Many develop coping strategies that mask their difficulties, which leads to a later diagnosis, sometimes not until adolescence or adulthood. As a result, they may miss out on early interventions that could help them thrive.

Many believe ADHD is a modern, Western diagnosis, but it is recognised globally and affects people across all cultures. Another myth is that ADHD disappears in adulthood, yet research shows symptoms often persist, sometimes presenting differently but still impacting daily life.

Poor parenting is frequently blamed, with some assuming stricter discipline could “fix” ADHD. In reality, it is a neurological condition and is often hereditary. Sleep difficulties are also misunderstood, with many assuming they result from medication when in fact, ADHD itself often disrupts sleep.

Medication is seen as the only treatment or as being overprescribed, yet in Australia, it is tightly regulated and only prescribed after a thorough assessment. Many children also benefit from behavioural strategies, therapy and school support.

Teachers are often the first to notice potential signs of ADHD, but its complexity can make it difficult to fully recognise. As mentioned, ADHD presents in varied ways, making it essential to identify the condition rather than mistake symptoms for a lack of effort or motivation. There’s still much progress to be made in understanding mental health and its impact on daily life, particularly in school, social settings and professional environments.

We strongly encourage educators to learn more about ADHD, coexisting conditions and their students as individuals. Parents can offer valuable insights, and regular professional development is key. How well ADHD is managed can profoundly shape a student’s learning, school experience and future.

The stigma around ADHD often leads students and families to limit disclosure, so discretion is essential. Establish agreed-upon strategies to support focus, avoid discussing medication publicly and never shame students for their behaviour. Expect inconsistency—even with medication— as abilities can fluctuate daily and across contexts. While this can be frustrating for teachers, it’s even more so for students. Acknowledge their successes, as these moments provide valuable insights for later progress.

Boys are diagnosed with ADHD about four times more often than girls, partly because hyperactivity tends to be more noticeable. Girls, however, often show inattentive traits, which can be harder to identify. As a result, they are frequently diagnosed later and miss out on early support that could help them in school.

Diagnosing ADHD is a detailed process that requires input from multiple sources. A clinical psychologist, paediatrician or psychiatrist conducts the assessment using parent and teacher reports, psychometric testing and clinical observation. Since ADHD symptoms must be consistent across different settings, gathering information from various aspects of a child’s life is essential to making an accurate diagnosis.

ADHD rarely exists in isolation. Many children also experience learning difficulties, anxiety, mood regulation challenges or other developmental conditions. These overlapping factors can complicate both identification and treatment, which makes it crucial for professionals to assess the full picture rather than focusing solely on attention and impulsivity. A comprehensive evaluation helps determine the best approach to managing both ADHD and any coexisting issues.

Once diagnosed, ADHD management is tailored to the individual. Treatment may involve behavioural strategies, structured routines or therapy to help develop coping skills. In some cases, medication is recommended to address core symptoms. Educational accommodations, such as extra time on tasks or adjustments to workload expectations, can also provide meaningful support.

Childhood and adolescence are challenging enough, and ADHD adds another layer of complexity. Research shows ADHD isn’t one-size-fits-all, making accurate diagnosis and appropriate support difficult. Parents often face long wait times, conflicting advice and uncertainty about the best approach.

If you’re concerned your child may be showing signs of ADHD, professional help can provide an accurate diagnosis and guide you toward the right treatment. At NextGen Psychology, we offer thorough assessments and personalised treatment plans.

Taking the first step toward seeking help can feel daunting, but it’s also a clear sign of strength and courage. Contact us to learn more.