Why Blaming Screens for Cognitive Decline Misses the Point

Recent testimony to the US Senate on “cognitive decline” and educational technology has reopened a familiar conversation: whether screens are eroding young people’s capacity to think, and whether technology in classrooms is doing more harm than good. The clip has travelled widely on LinkedIn, often shared as a settled verdict. I find it more useful as a provocation. It raises questions worth taking seriously, even if, on reflection, I think its conclusions point us in the wrong direction.

My own view is that the problem is not devices. It is how attention is being captured, shaped, and monetised, largely outside of schools, and largely without meaningful regulation.

Talking about “screens” or “technology” as a single category conflates a few issues. A device used to read, write, model a worked example, or practise retrieval is cognitively quite different from a phone delivering an algorithmically curated feed designed to maximise dwell time.

One supports thinking. The other tends to work against it.

What has changed most dramatically over the past decade is not classroom technology but the rise of algorithm-driven social media, optimised to hook users, reward emotional arousal, and fragment focus. These platforms are not designed to deepen reflection. Treating them as interchangeable with tools chosen to support learning is, I think, where much of the current debate goes astray.

If children today are finding it harder to concentrate, it seems reasonable to look first at the environments in which they spend hours every day. Short-form video, endless scroll, and attention-hungry platforms encourage shallow processing and rapid switching. These are not unfortunate side-effects. They are design choices, and they are a big part of why regulation matters.

Schools can make thoughtful decisions about pedagogy and tools, but they cannot reasonably be expected to counterbalance unregulated platforms whose business models depend on capturing and selling engagement. Framing this as a matter of individual willpower, or pointing the finger at teachers’ use of technology, inadvertently lets the real drivers off the hook.

Much of the evidence cited in critiques of edtech draws on correlations between screen exposure and attainment. These findings deserve careful attention, but they do not settle the question. Screen use is not a single thing, and context makes an enormous difference.

There are also positive associations between technology use and achievement, particularly where tools are aligned with well-established pedagogical principles rather than novelty or engagement for its own sake.

In the UK context, adaptive platforms such as Sparx Maths and Century Tech offer immediate feedback and targeted practice. Used alongside explicit classroom teaching, both have shown particular benefits for lower-attaining pupils by helping to diagnose gaps, respond to misconceptions, and pace practice more precisely than whole-class instruction alone.

Retrieval and spaced-practice platforms such as Carousel Learning and Seneca Learning can strengthen long-term retention when they are embedded in regular classroom routines. Their value lies not in gamification, but in making recall frequent, low-stakes, and curriculum-aligned.

For pupils with additional needs, assistive technologies play a different but equally important role. Tools such as Texthelp’s Read&Write and Microsoft’s Immersive Reader can open access to reading and writing, enabling participation in mainstream learning that might otherwise be out of reach. Here, technology is not accelerating learning so much as removing unnecessary barriers, which is valuable in its own right.

Some of the most powerful uses of technology in UK classrooms remain strikingly simple. Visualisers and tools such as Explain Everything allow teachers to model worked examples, annotate thinking in real time, and reduce cognitive load for novices. The gains here come from clarity, sequencing, and expert explanation. Once again, technology is serving instruction, not replacing it.

Across these examples, the pattern is consistent. Technology supports cognition when it is bounded, purposeful, and subordinate to pedagogy. None of these examples resemble the unregulated, engagement-optimised platforms that dominate young people’s lives outside school. The question, then, is not whether technology belongs in classrooms, but whether we are distinguishing clearly enough between tools that support learning and platforms designed to maximise dwell time.

The simpler way to put it is this. Technology helps when it supports the processes we know work in teaching and learning. It hinders when it distracts from them.

If we are genuinely concerned about cognitive stagnation, there are more plausible primary drivers than classroom technology. These might include:

• narrowed curricula that prize pace over depth
• insufficient time for sustained reading and writing
• drift away from evidence-informed practice
• reduced teacher capacity to plan, explain, and give feedback, often because of excessive workload
• and, yes, social media platforms that have largely been left to police themselves, with fairly predictable results

Classroom technology, used poorly, can of course have negative effects on learning. But to cast it as the primary driver of “cognitive decline” asks it to carry a great deal more weight than it can reasonably bear.

The policy implication, to my mind, is not to retreat from technology in schools, but to differentiate and regulate more intelligently. In practice, that might mean:

• stronger regulation of social media platforms whose algorithms are explicitly designed to maximise engagement at the expense of wellbeing
• clearer, age-appropriate protections that do not place the burden on schools and families alone
• evidence-informed standards for educational technology procurement that prioritise learning function over novelty
• data protection and transparency requirements that treat pupils as learners, not as products

The Senate testimony offers a timely reminder that technology adoption should never be uncritical, and that is a reminder worth heeding. But the more useful question is not “Are screens harming cognition?” It is something closer to:

Which technologies, used in which ways, and under what conditions, support thinking, and which undermine it?

Answering that honestly calls for nuance, evidence, and a willingness to look beyond the classroom. If you have watched this clip and been persuaded by its simplicity, that may say more about how effective the algorithm that brought it to you is than how well it explains what is happening.

For school leaders, the priorities remain grounded and familiar:

• protect time for deep reading, writing, and thinking
• be clear about pedagogy before choosing tools
• teach pupils how to learn, not just what to learn
• distinguish clearly between learning technologies and social media platforms
• advocate collectively for the kind of regulation that schools cannot deliver on their own

Blaming devices feels decisive, and there is some comfort in that. But if we are serious about cognition, we need to stop mistaking the tool in the classroom for the forces that are shaping habits of mind outside of it.

Photo by Brett Jordan