Learning Is a Change in Long Term Memory

I was sitting in a middle leadership seminar last Tuesday—one of those “professional development” sessions that could have been a well-constructed email—listening to a consultant explain the cognitive architecture of the brain using colourful, expensive slides. They were talking about the intricacies of how memory works in learning as if we were all operating in a pristine laboratory with thirty calm, attentive students and infinite time for reflection. It was exhausting. We both know that the theory of long-term encoding feels a lot different when you’re staring at a Year 9 class that has collectively decided that today is not the day they care about the causes of the Industrial Revolution.

I’m not here to sell you on more academic jargon or complex mnemonic systems that require three hours of prep you don’t have. Instead, I want to talk about what actually sticks when the bell rings and the room is chaotic. I’m going to strip away the neuroscientific fluff and look at the practical reality of memory: how to make it work when you’re exhausted, when the marking is piling up, and when you only have ten minutes of actual focus to work with. This is about surviving the classroom, not just passing a theory test.

Sensory Memory vs Short Term Memory Managing the Chaos

Now, let’s get into the weeds of the information processing model, but without the textbook jargon that makes your eyes glaze over during a staff meeting. Think of sensory memory as that split-second snapshot of everything hitting your pupils’ senses—the scratch of a pen, the hum of the radiator, or the person whispering in the back row. It’s a massive, chaotic flood of data. If we don’t give them a way to filter that noise, it just washes straight out of their heads. The real battle is getting that information to move from that initial sensory burst into short-term memory, which is where the actual work begins.

The problem is that short-term memory is incredibly fragile and has a tiny capacity. This is where cognitive load theory stops being an academic concept and starts being a survival guide for the classroom. If I stand at the front and deliver a ten-minute monologue while simultaneously asking them to copy a complex diagram from the board, I’ve effectively jammed their mental gears. You can’t expect them to process new concepts when their working memory is already redlining. To manage the chaos, we have to curate the input—keep instructions lean, visual aids clear, and give them the breathing room to actually digest one thing before we pile on the next.

The Information Processing Model Beyond the Textbook

Now, if you look at a standard textbook, they’ll show you a neat, linear diagram of the information processing model—input, storage, output—as if learning is a tidy little conveyor belt in a factory. It looks clean, it looks logical, and it is utterly useless when you’re standing in front of thirty-two teenagers who have just spent double maths and are currently vibrating with the need to be anywhere else. In the real world, that process isn’t a straight line; it’s a constant battle against noise, distraction, and the sheer sheer volume of stuff we’re trying to shove into their heads.

The theory tells us that information moves from working memory into long-term storage, but it forgets to mention that the working memory is incredibly fragile. This is where cognitive load theory stops being an academic concept and starts being a survival guide. If you dump too much new information on them at once, the whole system jams. You aren’t just teaching a concept; you are trying to manage the limited bandwidth of their brains while they navigate the chaos of the classroom. If the load is too heavy, nothing sticks, and you’ve just wasted forty minutes of your life.

Five ways to actually make memory work when you’ve only got forty minutes

• Stop the information dump. If you’re standing at the front delivering a twenty-minute monologue, you aren’t teaching; you’re just performing. The working memory is a tiny, fragile thing. If you overload it with too many new concepts at once, the lid stays on and nothing gets through to long-term storage. Break it up. Give them a bit, let them chew on it, then move.
• Use what they already know as an anchor. It is much harder to store a random, isolated fact than it is to attach a new piece of information to something they already understand. Before you dive into the new stuff, spend two minutes asking what they remember about the previous lesson. It’s not just a warm-up; it’s building the scaffolding they need to keep the new information from collapsing.
• Ditch the “one-and-done” approach. We’ve all seen it—you teach a concept on Tuesday, they seem to get it, and then by Friday, it’s gone. Memory requires repetition, but not the boring kind. Don’t just re-read the same notes. Mix it up. Ask a question about last week’s topic in the middle of this week’s lesson. It’s about strengthening those neural pathways through different angles.
• Visuals aren’t just for the “creative” kids. Dual coding—pairing a word with a simple image or a diagram—isn’t some trendy pedagogical fad; it’s just how the brain processes information more efficiently. A quick sketch on the whiteboard alongside your explanation gives their brain two different ways to retrieve that information later. It’s a safety net for when the verbal explanation fails them.
• Focus on the “low-stakes” win. Don’t wait for a massive end-of-unit test to find out they haven’t remembered anything. Use quick, ungraded quizzes or even just verbal check-ins. If they know a mistake won’t result in a red mark on a formal assessment, they’re more likely to engage with the retrieval process. It’s about building the habit of remembering, not the fear of failing.

The Reality Check: What Actually Sticks

Stop trying to dump a whole new unit into their heads in one go; if you overload their working memory during a chaotic Tuesday period four, you aren’t teaching, you’re just making noise.

Focus on the “bottleneck”—since their short-term memory is tiny and easily distracted by a fly on the window or a classmate’s whisper, keep your instructions short, sharp, and repeated.

Long-term memory isn’t a storage unit you just “fill”; it’s a web that needs constant, small connections, which is why a five-minute review is worth more than a two-hour lecture they’ll forget by lunch.

The Gap Between Theory and Tuesday Afternoon

“We spend far too much time discussing the elegant mechanics of how information moves from sensory input to long-term storage, as if we’re working in a laboratory. But in a real classroom, memory isn’t a smooth conveyor belt; it’s a leaky bucket being filled in the middle of a storm. If your strategy requires a perfectly quiet room and twenty minutes of uninterrupted focus to work, it isn’t a teaching strategy—it’s a fantasy.”

Ellery Mwangi-Selkirk

The Reality Check

So, we’ve looked at the plumbing of the brain—the sensory input, the working memory bottleneck, and the long-term storage that we all desperately want our students to use. But let’s be honest: knowing the theory doesn’t magically fix a Year 9 class that refuses to settle. The takeaway isn’t that you need to become a neuroscientist; it’s that you need to respect the cognitive load you are placing on them. If you throw twenty new concepts at a room of thirty kids during a period when they’re already hungry or tired, that information isn’t going into long-term memory; it’s just bouncing off the walls. We have to stop teaching for the “perfect” brain and start teaching for the fragile, easily overwhelmed working memory we actually see in front of us every day.

At the end of the day, don’t let the jargon make you feel like you’re failing. You aren’t a biological engineer; you’re a teacher trying to make sense of a chaotic world. If you can manage the chaos just enough to let one or two meaningful ideas stick, you’ve done more than most of the “innovative” white papers would suggest. Focus on the small, repeatable wins—the retrieval, the scaffolding, the steady pacing. It won’t feel like a revolution, and it certainly won’t look like a polished TED Talk, but it is how we actually build knowledge in the trenches. Keep going.

About Ellery Mwangi-Selkirk

Most educational advice is written for a classroom that does not exist — twenty motivated pupils, unlimited preparation time, no behaviour to manage. I write for the room you are actually in. What retrieval practice looks like when marking is already three weeks behind, why the seating plan matters more than the starter activity, and which of the last decade's initiatives left anything behind. Nineteen years taught me that the good ideas survive contact with a wet Wednesday and the rest do not.