The pitch for screens in classrooms was about access. Kids born into a world built on digital tools should grow up using digital tools, and the schools that didn’t help that happen would be holding them back. There was a phrase for this, “digital native,” and it did a lot of work. It implied that exposure was the thing. Put the device in front of the child early enough and the literacy would follow on its own.
We’re roughly two decades into running this idea at scale. The data is starting to come back, and it’s awkward.
A team led by Asst Prof Tan Ai Peng at A*STAR and the National University of Singapore published findings in eBioMedicine in December showing that children exposed to high levels of screen time before age two had changes in brain development linked to slower decision-making and increased anxiety by their teenage years.
They followed 168 children from the Growing Up in Singapore Towards Healthy Outcomes cohort, with brain scans at ages 4.5, 6, and 7.5.
Infants with high screen time showed accelerated but inefficient maturation in networks for vision and cognitive control. The brain differences predicted slower reaction times at age eight and higher anxiety symptoms by age thirteen.
The detail that matters most: screen time measured at ages three and four did not show the same effects. Infancy is the window.
Most parents don’t start worrying about screens until the kid is older and visibly hooked, which is several years past the point where this particular kind of damage is being done.
There’s a useful description of what’s actually going on, from Michael Rich at Harvard, who runs the Center on Media and Child Health at Boston Children’s Hospital. The growing brain is constantly building neural connections and pruning away less-used ones, and digital media use plays an active role in that process.
Pruning is the bit nobody quotes back to you. The brain doesn’t just add capacity, it removes it. Whatever a child’s brain doesn’t use during the years when these networks are being shaped, it loses access to. You don’t get those connections back later because you decided to read more in your twenties.
Handwriting is a useful test case here, because it’s been studied directly.
F. R. Van der Weel and Audrey Van der Meer at NTNU in Norway ran a high-density EEG study with 36 participants writing visually presented words by hand with a digital pen, then typing the same words on a keyboard.
When writing by hand, brain connectivity patterns were far more elaborate than when typewriting, with widespread theta/alpha connectivity coherence between network hubs and nodes in parietal and central brain regions. The authors went on to argue, controversially in some quarters, that children should be exposed to handwriting practice from an early age.
There’s also a published critique. A 2025 commentary in Frontiers in Psychology pointed to limitations in the protocol, analysis, and interpretation that cast doubt on some of the conclusions.
Fair. Take the study as one data point. But the underlying idea, that what your body is doing while you learn changes how your brain encodes the thing, has been around since long before the EEG study and isn’t really controversial. Forming a letter with a pen is a different cognitive event from tapping a key, and the brain seems to know it.
Sweden is worth looking at here, because they ran the experiment hard, got a result they didn’t like, and reversed course publicly enough that there’s actually something to read about.
By 2019, tablets were compulsory in Swedish pre-schools, which was as far down this road as any country in Europe had gone. Then the literacy results came back.
The 2021 Progress in International Reading Literacy Study put Swedish fourth graders at 544 points, down from 555 in 2016, which sounds small until you remember it happened in the country that had bet hardest on tablets fixing exactly this kind of problem.
The response was a reversal. Schools Minister Lotta Edholm, taking office in a new coalition government, told the press “Sweden’s students need more textbooks. Physical books are important for student learning.”
The government then moved to reverse the decision to make digital devices mandatory in preschools, with plans to end digital learning entirely for children under age six.
Linda Fälth, who teaches at Linnaeus University, told Undark in an email that the reasons included screen time, distraction, reduced deep reading, and the erosion of foundational skills such as sustained attention and handwriting.
The “erosion of sustained attention” part is what I keep coming back to.
The usual screens-are-bad argument is about content, or comparison, or sleep. All true, all worth taking seriously, all somewhat downstream.
The deeper claim is harder to sit with. It’s that heavy early screen exposure changes how a child’s brain learns to learn. Not just what they know but the equipment they bring to knowing anything later.
That isn’t settled science and I want to be honest about it.
The Swedish industry body argued that going analogue would leave children unprepared for digital workplaces, which is a real point even if it has an obvious vested interest behind it.
The OECD has urged caution against drawing simple cause-and-effect conclusions from the Swedish reversal. The screen-attention correlation in the data is real but not enormous. Anyone telling you the picture is clean is selling you something.
What I’d say is this.
The reason it matters more than a normal pedagogy argument is that the question isn’t only whether kids learn this material better with paper or with screens. It’s what kind of cognitive apparatus they end up with by the time they’re old enough for the question to feel like theirs.
If the apparatus has been shaped by years of work being offloaded to a glowing surface, the choice between paper and screen isn’t really a choice. The capacity for slow, unrewarding, internally generated thinking has already been thinned out.
The marketing pitch was that screens in classrooms would prepare kids for a digital future. What the evidence is starting to suggest is something else.
If you hand children tools that do the cognitive lifting during the years their brains are deciding which connections to keep, the lifting capacity itself doesn’t develop the way it would have otherwise. The kids end up well prepared for a world where the tools do the work, and considerably less prepared for the parts of life where they shouldn’t.
I don’t know what the policy answer looks like. The Swedes don’t either, which is part of why their reversal is worth watching rather than copying wholesale.
What I’d say is that the conversation has shifted ground without anyone announcing it. The default used to be that screens belonged in classrooms and anyone arguing otherwise had to explain themselves. That isn’t quite the situation anymore.
Sources
Huang P, Chan SY, Zhou K, et al. “Neurobehavioural links from infant screen time to anxiety.” eBioMedicine, December 2025. https://www.thelancet.com/journals/ebiom/article/PIIS2352-3964(25)00543-2/fulltext
A*STAR press release on the eBioMedicine findings, via EurekAlert, 30 December 2025. https://www.eurekalert.org/news-releases/1111150
“Early Screen Time Linked to Long-Term Brain Changes, Teen Anxiety.” Neuroscience News summary of the GUSTO cohort study. https://neurosciencenews.com/anxiety-neurodevelopment-screen-time-30079/
Michael Rich, interviewed in “Screen Time and the Brain.” Harvard Medical School. https://hms.harvard.edu/news-events/publications-archive/brain/screen-time-brain
Van der Weel FR, Van der Meer ALH. “Handwriting but not typewriting leads to widespread brain connectivity: a high-density EEG study with implications for the classroom.” Frontiers in Psychology, January 2024. https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2023.1219945/full
Pinet S, Longcamp M. “Commentary: Handwriting but not typewriting leads to widespread brain connectivity.” Frontiers in Psychology, January 2025. https://pmc.ncbi.nlm.nih.gov/articles/PMC11750765/
Charlene Pele, “Sweden brings more books and handwriting practice back to its tech-heavy schools.” Associated Press, September 2023. https://www.aol.com/sweden-brings-more-books-handwriting-061708649.html
“Why Swedish Schools Are Bringing Back Books.” Undark, April 2026. Includes the Linda Fälth email correspondence. https://undark.org/2026/04/01/sweden-schools-books/
“Sweden Reverses Digital Learning.” Open Magazine, April 2026. Includes the OECD caution and the Swedish Edtech industry counterpoint. https://arstechnica.com/science/2026/04/sweden-goes-back-to-basics-swapping-screens-for-books-in-the-classroom/
Originally published at https://digitalzero.org
