Active recall: how to quiz yourself from your own notes

What active recall is

Active recall is studying by answering questions from memory instead of reading the material again. You close the notes, try to produce the answer, then check. The effort of retrieving it is what does the work. Researchers call this retrieval practice, and the benefit it produces is known as the testing effect.

It's one of the most studied ideas in learning science. A 2013 review of ten common study techniques rated practice testing as high utility and rereading as low utility (Dunlosky et al., 2013). A 2017 meta-analysis concluded that practice tests are more beneficial for learning than restudying and all the other comparison conditions it looked at (Adesope et al., 2017).

If you want the wider picture of studying from notes, including spacing, start with how to study from your own notes before an exam. This post goes deeper on one thing: how to actually run recall sessions.

Why it feels worse than rereading

Recall is uncomfortable. You get things wrong, and a blank page looks like failure. Rereading feels smooth because every line is familiar. The trouble is that familiarity tells you very little about what you'll be able to produce in an exam.

In one experiment, students learned foreign language vocabulary. Once they had recalled a word correctly, some kept studying it and some kept being tested on it. Repeated studying had no effect on delayed recall, while repeated testing produced a large positive effect. The students' predictions of their own performance were uncorrelated with how they actually did (Karpicke & Roediger, 2008). In other words, your sense of how well a session went is a poor guide. Trust the method over the feeling.

Four ways to quiz yourself from your notes

All four formats use the same raw material: the notes you took in class or while reading. Pick the one that suits the topic and how much time you have.

1. The blank page

Take one lecture or chapter. Close everything and write down all you can remember for five to ten minutes: definitions, diagrams, steps, examples. Then open the note and mark what you missed in a different colour. The gaps are your study list for next time.

This works well for topics with structure, like a process or a system. Say your cardiology lecture covered the cardiac cycle. A blank page attempt might get the four chambers and the two circuits right but miss when the atrioventricular valves close. That one missing step is now obvious.

2. The question list

Go through a note and write questions it answers, without the answers. Keep them at the top of the note or on a separate sheet. Good questions ask you to explain, compare or predict:

• "Why does the left ventricle have a thicker wall than the right?"
• "What does a blood pressure of 140/90 mmHg tell you about systolic and diastolic pressure?"
• "What would happen to blood flow if the mitral valve didn't close fully?"

Answer them in writing or out loud before you check. A meta-analysis of the testing effect found that recall tests gave larger benefits than recognition tests (Rowland, 2014), so producing an answer beats picking one from options.

3. Flashcards

Flashcards suit facts with a clear answer: terms, drug classes, normal ranges, dates. Write the question on the front, the answer on the back, and keep each card to one idea.

How you use the deck matters. In a series of flashcard experiments, studying one large stack was more effective than studying four smaller stacks separately, because the large stack puts more time between repeats of each card. Spacing was more effective than massing for 90% of the participants, yet after the first session, 72% of them believed massing had worked better (Kornell, 2009). Keep your stack big and shuffle it.

4. Explain it aloud

Pick a topic and explain it to a friend, a pet or an empty room, without looking at your notes. Talk through how and why, not just what. When you stumble, write down the exact point where you got stuck. Then check that point against your notes.

This is close to self-explanation, which research has linked to deeper understanding. In one classic study, students who were prompted to explain each line of a text on the circulatory system to themselves gained more from pretest to posttest than students who read it twice (Chi et al., 1994).

How to run a recall session

1. 1Choose one topic, not a whole course. One lecture is a good size.
2. 2Pick a format: blank page for structure, questions for understanding, flashcards for facts, explaining aloud for mechanisms.
3. 3Answer everything from memory first. Guess if you have to.
4. 4Check against your notes and mark each answer right, partly right or wrong.
5. 5Rewrite the wrong ones as new questions and put them at the front of the queue for next time.
6. 6Come back to the topic in a few days and repeat.

Common mistakes

• Peeking. Glancing at the answer before you've committed to one turns recall back into rereading.
• Only quizzing what you know. It's tempting to keep the easy cards. Spend your time on the ones you miss.
• Questions that are too narrow. "Name the valve" is fine, but mix in "explain why" questions too.
• Stopping once you get it right once. A correct answer today is a starting point. Come back to it.

Washington University's Center for Teaching and Learning has a readable summary of the retrieval practice research if you want to go further (WashU CTL).

Using an AI notes app without skipping the recall

An AI tool can quietly undo all of this. If you ask a question and read the answer before trying, you're rereading again. Used the other way round, it can help: answer from memory first, then ask, and compare.

That's the order we'd suggest with Lumyo. Choose the notes for one course, attempt the question yourself, then ask. Each answer cites the notes it used, and tapping a source opens the exact line, so you can see where your answer and your notes differ. If your notes don't cover the question, it says so instead of guessing.