How to Memorise Things Fast (and Make Them Stick)

You open your textbook, read the same page three times, highlight half of it in yellow, and still draw a blank in the exam. If that sounds familiar, the problem is not your memory. It is your method.

The fastest reliable way to memorise things is to retrieve them from memory rather than re-read them. A landmark study by Roediger and Karpicke (Psychological Science, 2006) found that students who practised recall retained substantially more information a week later than students who spent the same time re-reading the same material. The technique feels harder in the moment, which is exactly why it works.

This guide covers the memory techniques that hold up under research scrutiny, roughly in order of how much difference they actually make.

Why re-reading doesn't work (even when it feels like it does)

Re-reading produces familiarity: the words look familiar, so they feel learnt. But familiarity and memorisation are different things. Hermann Ebbinghaus mapped this in 1885 with his forgetting curve. In his own self-experiments, he found he forgot a substantial portion of newly learnt material within a day and most of it within a week unless he actively reviewed it.

The same curve applies to revision notes, history dates, biology definitions and chemistry equations. Seeing something once, or even twice passively, is rarely enough. The question is how to review it effectively, not just how to review it more often.

The single most powerful technique: retrieval practice

Retrieval practice (also called the testing effect or active recall) means closing the book and trying to recall information before checking whether you were right.

In Roediger and Karpicke's 2006 study in Psychological Science, two groups studied the same texts. One group re-read them repeatedly; the other tested themselves on the material. On a delayed test given days later, the retrieval group substantially outperformed the re-reading group, and the advantage grew over time rather than shrinking. The students who had re-read consistently overestimated how much they would remember.

In practice, retrieval practice looks like this:

• Read a section, then close the book and write down everything you can remember.
• Use flashcards and actually test yourself on them, rather than flipping through passively.
• Answer past-paper questions from memory, not by looking at your notes first.
• Explain a topic out loud as if teaching it to someone who knows nothing about it.

The discomfort of not knowing is the point. Struggling to retrieve something, then finding it, creates a stronger memory trace than reading the answer passively. Our full guide on active recall walks through how to build this into daily revision.

Space your reviews, not your study sessions

The second research-backed technique is spaced repetition: reviewing material at increasing intervals rather than massing it into a single session.

A 2006 meta-analysis by Cepeda and colleagues in Psychological Bulletin, covering 254 studies and over 14,000 observations, found that spaced practice consistently outperformed massed practice (cramming) for long-term retention. A brief review a few days after learning is far more effective than spending the same time re-reading everything on day one.

A practical spaced schedule might look like:

• Day 1: learn the material
• Day 2: first short review
• Day 5 or so: second review
• Day 14: third review
• Day 30+: final review before the exam

This is the bit most students find impossible to maintain across three, four or five subjects simultaneously. Working out which topics need review and when, for every subject at once, is a genuinely complex scheduling problem, and it is the point where most people quietly give up on the method. It is also exactly why we built Root, an AI tutor that learns how your brain learns and takes over the management of your revision: it tracks every topic you have covered, spots what you keep getting wrong, brings weaker material back at the right intervals and builds each practice session for you, so you just show up and study what it puts in front of you. On the free plan that includes real one to one tutoring every week, examiner-marked practice tests and a revision mode that keeps re-testing your weak topics until they hold, with no card details needed. If you want the full picture first, here is a complete breakdown of what Root does.

You can also do this manually using an app like Anki, which calculates review intervals based on how well you remembered each card. Our deeper guide on spaced repetition covers how the intervals work and how to set it up.

The memory palace for sequences and lists

For long ordered sequences, foreign vocabulary, historical dates, groups of chemical elements or any list that needs to come out in the right order, the memory palace (or method of loci) is hard to beat.

The technique goes back to ancient Greek rhetoric. You visualise a familiar place, such as your house or the route to school, and mentally place vivid, unusual images representing the material you want to remember at specific spots along a route. To recall the information, you mentally walk the route.

A 2003 study published in Nature Neuroscience by Maguire and colleagues examined top memory champions. Most reported using the method of loci as their primary strategy, not any innate talent. Brain scans during memory tasks showed activation in regions associated with spatial navigation, consistent with the memory palace technique rather than an exceptional native memory ability.

For GCSE history, you might place the main causes of the First World War at different spots in your house: the assassination of Franz Ferdinand at the front door, the alliance systems in the hallway, the arms race in the kitchen, imperial competition in the living room. Vivid, spatial, sequential. It sounds strange but it works.

Ask "why?" not just "what?"

Elaborative interrogation means, after reading a fact, asking yourself "why is this true?" and generating the explanation in your own words.

Dunlosky and colleagues, in their 2013 review of ten study techniques in Psychological Science in the Public Interest, rated elaborative interrogation as moderate utility. It is less powerful than retrieval practice on its own, but it strengthens memory by creating more connections to the same piece of information.

Rather than memorising "the mitochondria produces ATP", you would ask yourself: "Why does the cell need a separate organelle for this? What would happen without it? Why ATP specifically?" Connecting a fact to its causes and consequences gives you multiple routes back to the same memory.

This is especially useful in biology, chemistry, geography and history, where cause-and-effect chains run through everything.

Chunking: organise first, memorise faster

Working memory can hold roughly four distinct items at once, according to Cowan's 2001 analysis in Behavioral and Brain Sciences. Chunking means grouping information into meaningful clusters so that each slot in working memory holds a larger piece.

Phone numbers are the classic example: 07700 900 123 is far easier to hold than eleven separate digits, because it is three chunks rather than eleven.

For revision:

• Group vocabulary by theme rather than alphabetical order.
• Learn the five causes of a historical event as an acronym rather than five separate facts.
• Structure chemistry equations into a consistent format (reactants, conditions, products) before committing them to memory.
• Organise an essay argument into its three or four main ideas before drilling the specific evidence under each.

The structure is not just a presentation aid. It is itself a memory tool. Organised information requires less effort to store and retrieve.

Sleep: the consolidator you cannot skip

Sleep is not passive rest for the brain. During slow-wave sleep and REM sleep, the brain replays new memories and integrates them into long-term storage. Sleep deprivation does not just make you tired; it directly impairs memory consolidation.

A practical implication: a brief review of material studied earlier in the day, done just before sleeping, gives the brain stronger material to consolidate overnight. This is not an argument for all-nighters; it is the opposite. Study, then sleep, in that order.

This also means that spreading revision across multiple sessions with sleep in between is more effective than a single marathon session of the same total length. Four hours spread across two days genuinely beats four hours in one night, for retention if not for the feeling of productivity.

Putting it all together: a session that actually builds memory

A revision session that combines these techniques might look like this:

1. Learn a section actively: read it, then cover it and summarise it in writing.
2. Retrieve: close the book and write or say everything you can recall.
3. Check: look at the original and note what you missed.
4. Explain the gaps: ask "why?" about anything you forgot.
5. Schedule a review in a few days, not a few hours.

The study techniques guide covers how to combine this with interleaving (mixing topics) and dual coding (diagrams alongside text) for even stronger results. For making retrieval practice as low-friction as possible, how to use flashcards effectively is the next step.

What does not work (and why)

For completeness, techniques that consistently underperform in the research:

• Re-reading and highlighting: Dunlosky 2013 rated both as low utility. Familiarity feels like learning but is not.
• Summarising without testing: useful for organising material initially; weak for memorising it.
• Cramming: effective for the next morning; unreliable for an exam in two weeks.

The common thread in low-utility methods is passivity. Memory is built through effort, retrieval and review at the right time. There is no shortcut around that, but once you are using the right methods, you need less total study time to remember more, and you lose far less of it in the days before the exam.

If you are working through GCSE revision and want to see how these techniques fit into a broader revision plan, how to revise for GCSEs puts all the moving parts in one place. And for practising retrieval on real exam questions, how to use past papers effectively shows you how to turn mark schemes into a teaching tool rather than just a scorecard.