Active recall: the study technique that beats re-reading

Why re-reading is a trap

When you re-read your notes, everything looks familiar, and familiarity feels like knowing. But recognising something on the page is not the same as being able to produce it in an exam, when the page is gone.

Research on the testing effect, sometimes called retrieval practice, finds that trying to recall information strengthens memory more than studying it again for the same amount of time.

Five ways to use it

You do not need special tools. You need a question and a moment of effort before you check the answer.

• Close the book and write down everything you remember about a topic, then check what you missed.
• Turn headings in your notes into questions and answer them out loud.
• Make flashcards with a question on the front and the answer on the back.
• Do past papers or practice quizzes under exam conditions.
• Teach the topic to a friend, or to an empty room, without notes.

Make mistakes useful

Getting something wrong while practising is not a failure. It is the cheapest time to find a gap. Write down what you missed, look it up, and test yourself again later the same day and a few days after.

Mix it with spacing

Active recall tells you how to study, and spaced repetition tells you when. Together they are the core of most evidence-based study advice: test yourself, and repeat the tests over several days.