7 ADHD Myths Debunked by a Teacher Who Believed Them Too
I've spent over a decade in classrooms, and even with an ADHD diagnosis of my own from right at the start, it's taken me most of that time to really understand what ADHD actually is.
Not the textbook version - the real one. The one that shows up in a Year 9 student who can recite the entire periodic table from memory but can't remember to bring a pen to class. The one that shows up in a Year 13 who writes essays that make you stop and re-read a sentence three times, but who hands them in four days late, in a panic, at 11pm.
For years, I saw these patterns and, if I'm honest, I made the same assumptions most people make about ADHD. I thought I understood it. I didn't.
My own diagnosis came right at the start of my teaching career, and it happened almost by accident. I was sitting through a lecture on neurodiversity - the kind of thing you attend because it's relevant to your students, not because you think it's relevant to you - and somewhere in the middle of it, I stopped taking notes on my students and started recognising myself instead.
That moment reframed everything I thought I knew, right as I was starting out. So for my entire career, I've been watching these patterns in students through the lens of someone who was learning about my own brain at the very same time.
So here are the most common ADHD myths I used to believe. Maybe you believe some of them too…
Myth 1: ADHD Is Just a Lack of Discipline or Willpower
This is the big one, and it's the one that causes the most damage.
I used to think that if a student really wanted to do well, they'd just... do the thing. Start the assignment. Remember the deadline. Sit still through the lesson.
What I didn't understand is that ADHD isn't a willpower problem - it's a brain-wiring difference in how dopamine, attention, and executive function work (I go into this in more depth in my guide to the ADHD brain). Telling someone with ADHD to "just try harder" is a bit like telling someone with short-sightedness to squint harder! It's not that they're not trying. It's that the system they're trying to force themselves through wasn't built for how their brain works.
Myth 2: Smart or High-Achieving People Don't Have ADHD
I met some of the sharpest, most creative students of my career who were also the ones falling apart under the weight of missed deadlines, lost homework, and last-minute all-nighters.
I used to think: surely if they were struggling this much, they couldn't be that capable. It took me years to realise it was the opposite. Some of my most capable students were burning enormous amounts of energy just to keep up - energy that a student without ADHD wasn't spending at all. Their intelligence wasn't in question. Their environment was working against them.
You don't have to look far to see this play out on a much bigger stage. Richard Branson has spoken openly about his ADHD and dyslexia, and built an entire business empire around them rather than in spite of them. Simone Biles - the most decorated gymnast in history - publicly confirmed her ADHD diagnosis after her medical records were leaked in 2016, and has spoken about it ever since without apology.
None of these are stories of people succeeding "despite" having ADHD, as if it were a weight they had to drag along behind them. They're stories of people who found the right environment, the right systems, or the right outlet for how their brains actually work - and that's exactly the shift I try to help my clients make.
Myth 3: ADHD Only Affects Boys
In my early years, if a student was bouncing off the walls, calling out answers, or struggling to sit still, ADHD was on my radar pretty quickly.
But the quiet girl at the back, staring out the window, whose homework never quite got done… I didn't see it. For years, I didn't see it in a lot of my female students at all. Inattentive-type ADHD doesn't look like the stereotype, and it's still hugely underdiagnosed - especially in girls, who are often just labelled "dreamy" or "a bit disorganised" instead.
Myth 4: People With ADHD Can't Focus on Anything
This one confused me for years, because I had students who couldn't focus on a worksheet for five minutes, but who could lose themselves in a piece of art, a video game, or a passion project for hours without noticing time passing.
That's hyperfocus, and it's a genuinely fascinating part of how ADHD brains work. It's not that attention is broken - it's that it's inconsistent, and it's heavily driven by interest and stimulation rather than by importance or deadlines. Once I understood that, so much of what I'd seen in the classroom made sense.
Myth 5: If You Can Focus on Things You Enjoy, You Don't Really Have ADHD
This is the flip side of the last myth, and I used to genuinely believe it. A student would tell me they had ADHD, and then I'd watch them focus intently on something they loved, and quietly think: well, that doesn't add up.
It adds up perfectly. Hyperfocus and inattention are two sides of the same coin, not evidence against each other. The ability to disappear into a favourite subject doesn't cancel out the very real struggle to start a task that doesn't interest them.
Myth 6: Medication Is the Only Real ADHD Treatment
Medication genuinely changes things for a lot of people, and I'm not here to talk anyone out of it. But I used to think it was the whole answer - that if someone wasn't medicated, there wasn't much else to be done.
What I've learned since is that understanding how your own brain works, building systems and environments that fit you, and working with your strengths instead of against them, matters just as much. Medication can help. It's not the only lever.
Myth 7: ADHD Means Someone Isn't Capable
This is the myth that sat underneath all the others, if I'm honest with myself.
Somewhere, without meaning to, I equated "struggling to keep up with the system" with "not capable of succeeding in it." I was wrong, and I saw it proven wrong over and over - in myself and in students who went on to do remarkable things once they found an approach that actually matched how their brain worked.
That's the belief this entire blog, and the work I do now, is built on: ADHD isn't a capability problem. It's a mismatch between brain and environment - and once that mismatch is addressed, the capability was there all along.
Frequently Asked Questions
What is the biggest myth about ADHD? One of the most damaging is that ADHD is simply a lack of willpower or discipline. In reality, it reflects real differences in dopamine regulation and executive function, not a character flaw.
Can high-achieving or intelligent people have ADHD? Yes. ADHD affects executive function and attention regulation, not intelligence - many high-achieving people manage ADHD by working harder to compensate for a mismatch between their brain and their environment, often at a high personal cost.
Why is ADHD underdiagnosed in girls and women? ADHD in girls and women more often presents as the inattentive type rather than the hyperactive type, so it's frequently missed, misread as anxiety, or dismissed as being "dreamy" or "disorganised."
Is medication the only effective ADHD treatment? No. Medication can be highly effective for many people, but coaching, environmental changes, and skills-based strategies that work with the ADHD brain are also a core part of effective treatment for most people.
