Active Recall: How to Study With It (Guide + Quiz)
On this page
- What is active recall?
- Why does active recall work better than rereading?
- Active recall vs rereading vs highlighting
- How to do active recall: 6 methods that work for any subject
- How to build an active recall study session (step by step)
- What are common active recall mistakes?
- How long until active recall shows results?
- Doing this in Noto Studio
Active recall is a study method where you pull information out of your memory, by answering questions, explaining a topic from scratch or writing down everything you know, instead of putting it back in by rereading. Every time you retrieve a fact, you make it easier to retrieve again, which is why active recall is one of the most reliable ways to remember what you study.
If you have ever reread a chapter three times, felt you knew it, then gone blank in the exam, you have met the problem active recall solves. Rereading feels productive because the page looks familiar. Familiarity is not memory. This guide shows you what active recall is, why it works, and six concrete ways to use it in any subject, with a quiz and practice exercises you can do right here.
What is active recall?
Active recall (also called retrieval practice) means testing yourself on material before you feel ready. The key is that your brain has to produce the answer, not recognise it. Looking at a highlighted sentence and thinking "yes, I know that" is recognition. Closing the book and writing that sentence from memory is recall.
The difference matters because exams ask you to produce answers. Studying by recognition trains a skill you will not use on exam day. Studying by recall trains exactly the skill you need.
Why does active recall work better than rereading?
In a classic experiment, students read a short text and then either reread it several times or took repeated recall tests on it. Five minutes later, the rereaders did slightly better. One week later, the students who practised recall remembered far more (about 61% of the ideas versus 40%)1. Retrieval did not just measure learning, it caused it.
Later studies found the same pattern with longer material, real classrooms and different ages. In one study, students who practised retrieval outperformed students who built detailed concept maps, even on questions that asked them to draw inferences2. Large reviews of learning techniques rate practice testing as one of the two most effective strategies for students, alongside spaced practice, while rereading and highlighting are rated low3.
Three things happen when you retrieve something:
- The memory gets stronger. Each successful retrieval makes the next one easier and faster.
- You discover what you do not know. A blank page is honest feedback. Rereading never tells you that you have forgotten something.
- Knowledge becomes usable. Practising retrieval in different forms (questions, explanations, problems) builds flexible memories you can apply to new questions.
Quick check: do you really know how active recall works?
1. Which of these is active recall?
Active recall vs rereading vs highlighting
| Method | What your brain does | Feels like | Long-term retention |
|---|---|---|---|
| Rereading | Recognises familiar text | Easy, productive | Low |
| Highlighting | Selects, but rarely processes | Busy, organised | Low |
| Summarising (copying) | Reorganises with the source open | Effortful | Moderate |
| Active recall | Reconstructs information from memory | Hard, sometimes frustrating | High |
That "hard, sometimes frustrating" feeling is a good sign. Researchers call it a desirable difficulty: effort during learning that pays off later. If a study session feels too comfortable, you are probably recognising, not recalling.
How to do active recall: 6 methods that work for any subject
1. Turn headings into questions
Before reading a section, rewrite its heading as a question ("Mitosis" becomes "What are the stages of mitosis and what happens in each?"). After reading, close the book and answer it out loud or on paper. This works with lecture slides too: one question per slide title.
2. The blank page (blurting)
Set a timer for 10 minutes and write everything you remember about a topic on a blank page, with no notes. Then open your notes and fill the gaps in a different colour. The gaps are your study list for the next session.
3. Flashcards, used properly
Flashcards are active recall only if you answer before you flip. Say or write your answer first, then check. Keep one idea per card, phrase the front as a question, and put the cards you missed back in the pile.
4. Explain it like a teacher
Explain a concept from memory as if teaching a friend who missed the class. Wherever you hesitate or say "basically", you have found a gap. This is the core of the Feynman technique.
5. Practice questions and past papers
Past exam questions are the purest form of active recall because they match the format you will face. Do them closed-book first, mark them, and only then look at the solutions.
6. Write your own exam
Ask "what would I ask if I were the examiner?" and write five questions per lecture. Writing good questions forces you to understand what matters, and you get a ready-made revision quiz.
Try it: the 2-minute blank page
Without scrolling up, write the six active recall methods from this guide. Then reveal the answer and count how many you got.
How to build an active recall study session (step by step)
- Learn first, briefly. Read or watch the material once with full attention. Do not take long notes; mark what you will need to remember.
- Close everything. Notes away, phone in another room.
- Recall for 10 to 20 minutes. Use one of the six methods above: questions, blank page or flashcards.
- Check and correct. Compare with your notes. Mark every gap or error, and add a flashcard or question for each one.
- Recall the gaps again before ending the session, so you finish on a successful retrieval.
- Schedule the next round. Come back after a day, then a few days, then a week. Spacing your recall sessions is what makes memories last until the exam.
Combining active recall with spacing is far more powerful than either alone, because each retrieval happens just as the memory starts to fade3. A simple rhythm is: day 1, day 3, day 7, day 14, then before the exam.
Flashcards: active recall in 6 cards
What are common active recall mistakes?
- Peeking too early. If you flip the card after two seconds, you are back to recognition. Give yourself time to struggle.
- Only testing what you already know. It feels good to ace the easy cards. Spend most of your time on the ones you miss.
- Making cards that are too big. "Explain the causes of World War I" is an essay, not a flashcard. Split it into smaller questions, and keep the big question for explain-it-out-loud practice.
- Recalling without checking. Retrieval works best with feedback4. Always compare your answer to the source and correct it.
- Waiting until you feel ready. Start recall early, even after one reading. Getting things wrong during practice is part of the method.
How long until active recall shows results?
You will notice the difference at your first quiz or test: material you practised retrieving comes back faster and more completely. The bigger benefit appears over weeks, because recalled material is forgotten more slowly than reread material. Most students find that active recall sessions are shorter than rereading sessions for the same result, which frees time for practice questions.
Your active recall session checklist
Doing this in Noto Studio
Noto turns your notes into question-and-answer flashcards and schedules them with spaced repetition, so each card comes back right before you would forget it. You can also generate a practice quiz from a note or a lecture PDF, or use Explain It Back to explain a concept in your own words and get feedback on what you missed. Manual flashcards are free; AI generation is part of the paid plans, with a free trial.
References
- Roediger, H. L., & Karpicke, J. D. (2006). Test-enhanced learning: Taking memory tests improves long-term retention. Psychological Science, 17(3), 249–255.
- Karpicke, J. D., & Blunt, J. R. (2011). Retrieval practice produces more learning than elaborative studying with concept mapping. Science, 331(6018), 772–775.
- Dunlosky, J., Rawson, K. A., Marsh, E. J., Nathan, M. J., & Willingham, D. T. (2013). Improving students' learning with effective learning techniques. Psychological Science in the Public Interest, 14(1), 4–58.
- Agarwal, P. K., Nunes, L. D., & Blunt, J. R. (2021). Retrieval practice consistently benefits student learning: A systematic review of applied research in schools and classrooms. Educational Psychology Review, 33, 1409–1453.
Frequently asked questions
Is active recall better than rereading?
Yes. Experiments consistently show that students who practise retrieving information remember much more after a week than students who spend the same time rereading. Rereading feels easier, but it mostly builds familiarity, not memory.
How do I start active recall if I don't understand the material yet?
Read or watch the material once with full attention first, then start recalling straight away, even if it feels too early. Getting answers wrong during practice is part of the process; check your notes and try again.
Is active recall the same as using flashcards?
Flashcards are one form of active recall, but only if you answer before flipping the card. Writing everything you know on a blank page, answering practice questions and explaining a topic out loud are also active recall.
How long should an active recall session be?
Ten to twenty minutes of recall per topic is enough for most sessions, followed by checking and correcting. Short, regular sessions spread over days work better than one long session.
Does active recall work for maths and science?
Yes. In maths and science, recall means solving problems without looking at worked examples, writing formulas and definitions from memory, and explaining why each step of a method works.
Should I combine active recall with spaced repetition?
Yes. Spacing your recall sessions over days and weeks makes memories last much longer than recalling everything in a single day. A simple rhythm is day 1, day 3, day 7 and day 14.
Keep reading
Befriend the Forgetting Curve: A Spaced-Repetition Schedule You Can Actually Keep
Your memory fades on a schedule you can predict — and exploit. Here's how to turn Ebbinghaus's forgetting curve into a low-effort review routine that actually sticks.
Why Rereading Fails: The Science of Retrieval Practice for Students
Highlighting and rereading are wasting your study time. Discover the retrieval practice and spaced-repetition research that actually guarantees long-term retention.