How to improve memory retention when revising for exams
Most students have experienced it: you spend hours revising, feel confident at the time, and then a few days later it’s like everything has disappeared. The problem with memory retention isn’t usually about how much you revise - it’s how effectively your brain is storing and retrieving that information.
In this guide, we’ll break down the science behind memory and share practical retention strategies you can start using straight away.
Whether you’re preparing for GCSEs or A-Levels with Eduqas or any other exam board, these techniques will help you revise smarter and feel more confident going into your exams.
Why you might be forgetting what you revise
If you’ve ever wondered “why doesn’t my revision stick?”, we promise you’re not alone. Forgetting what you study is completely normal - but understanding why it happens is the first step to fixing it.
There’s a few reasons this might be happening…
The forgetting curve
One of the main reasons revision doesn’t last for some people is something called the forgetting curve, which shows that we forget information rapidly after learning it, especially if we don’t revisit it. In fact, you can lose a large portion of what you’ve revised within just a few days.
This is why cramming the night before an exam rarely works. Without revisiting and reinforcing information, your brain assumes it’s not important and lets it fade away.
Passive vs active revision
Another key reason why revision might not stick is the type of revision you’re doing.
There are two different types of revision – passive and active. Passive revision includes re-reading notes, highlighting books or watching revision videos without testing yourself, for example. While these methods might feel productive, they don’t force your brain to retrieve information - which is essential for memory.
In contrast, active revision (for example testing yourself or using flashcards) strengthens your ability to recall information later. If you’re mostly using passive techniques, it’s a big reason why you forget what you revise.
Trying to learn too much too fast
Trying to revise too much in one session can also backfire because your brain has a limited capacity for processing new information, and when you exceed it, you experience cognitive overload.
When information isn’t properly processed, it doesn’t get stored effectively in long-term memory. Instead, it stays in short-term memory and fades quickly. This highlights why cramming revision doesn’t stick, because if you overload your brain, it simply can’t retain everything, so much of it is lost soon after you finish revising.
This all leads us nicely onto the main purpose of this blog…
7 proven techniques to improve memory retention
If you want your revision to actually stick, you need to focus on how your brain stores and retrieves information.
The following seven techniques are backed by cognitive science and used by high-performing students because they strengthen long-term memory - not just short-term recognition.
1. Active revision
As we touched on above, active revision is all about testing yourself instead of simply re-reading notes. Every time you force your brain to retrieve information, you strengthen the memory.
How to use it:
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Create flashcards with questions on one side and answers on the other
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Cover your notes and write out everything you remember
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Use practice questions without looking at answers
Your brain processes visual and verbal information separately, so combining them creates stronger memory links.
So, instead of just writing notes, why not try:
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Diagrams and labelled drawings
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Mind maps
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Timelines (for history)
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Flowcharts (for processes)
Colours also work because they make information more visually distinctive, and your brain is more likely to remember something that stands out compared to plain black-and-white notes.
One study found that red improved memory retention to around 56–57%, compared to around 20–22% for black text.
It’s important to note, however, that while colour can support revision, it is most effective when combined with active techniques like self-testing and active revision.
There are several ways you can practice this, for example, explaining what you’ve learned to a friend or family member, talk through a topic step by step to yourself, or act like a teacher with a whiteboard, as if you’re delivering a lesson.
As well as memory retention, another huge benefit of using past papers is time management. If possible, practise completing them under real exam conditions. This will help you understand how long to spend on each question and build confidence with timing.
Discover more reasons why you should use past papers in this blog.
This is why we highly recommend you break large pieces of information into bite-sized sections that are easier to understand and memorise.
A good example for biology could be to break a topic like the human circulatory system into smaller sections: the heart and its chambers, blood vessels and circulation routes, types of blood cells, and how oxygen and nutrients are transported. This way, each part can be studied and memorised individually before linking them together for a complete understanding
Our brains have a limited capacity for holding new information at once, so trying to memorise everything in one go often leads to confusion and rapid forgetting.
As we touched on at the beginning of the blog when talking about the ‘forgetting curve’, revisiting information over time is one of the most effective ways to make your revision stick long-term.
By reviewing content at regular intervals, you reinforce your memory and move knowledge from short-term to long-term storage.
The best way to do this is to review a topic the day you learn it, then 2–3 days later, then a week later, and again after two weeks.
We hope this blog has helped you understand why revision sometimes doesn’t stick and, more importantly, how you can improve your memory retention using proven techniques.
For more revision tips, check out our student support blogs, including 'GCSE maths past papers: how to revise effectively using exam papers', 'English Language exam guide' and 'Exam preparation: top apps and websites for students'.