Question
Answer
Active recall + spaced repetition
Study what you are closest to forgetting.
Learning is something you do, not something that happens while you look at an answer. Recall asks you to take ownership of each study decision: retrieve the idea, explain it in your own words, judge your memory honestly, and return when practice is due.
Saying an answer aloud before revealing it is more effective than silently reading or recognizing it. Speaking forces you to produce the answer from memory and makes gaps in your understanding easier to notice.
- Choose the correct data set. Select the class or unit assigned by your teacher. A teacher may also provide a separate study data set to open.
- Retrieve before you reveal. Read the question, look away if helpful, and say your complete answer aloud. Only then select Reveal answer.
- Rate yourself honestly. Choose Don't know, Review, or Know it based on what you recalled before seeing the answer. Honest choices create a useful review schedule.
- Return when cards are due. Short sessions spread across several days are more effective than one long cramming session.
- Document your work. After completing a session, download the study screenshot. It records your identity, date, deck, statistics, and recent recall log for submission to your teacher.
Your privacy: your name, email, card history, and schedule stay in this browser's local storage. The site does not submit them to a server. The screenshot is created on your device and is shared only when you choose to submit it.
How to study with Recall
1. Select your data set. Use the Class or unit menu, or open the study data set supplied by your teacher.
2. Say the answer aloud. Produce a complete answer from memory before selecting Reveal answer.
3. Rate your recall honestly. Your choice determines how soon the card returns.
4. Finish and document. Complete the session, then download the study screenshot to submit to your teacher.
Assessment note: your teacher is looking for evidence of consistent study time across multiple days, not the percentage of cards you mark correct. Honest practice matters more than trying to make the score look perfect.
Privacy: profile and study data remain in this browser. Nothing is uploaded, and clearing browser data removes the local record.
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Review session
Retrieve the answer
Say your complete answer aloud before selecting Reveal answer.
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Retrieval strengthens memory.
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Deck contents
Concepts
Privacy and local data
This app stores the learner profile, card schedule, and study statistics only in this browser's local storage. Clearing browser data removes that information.
Use a progress backup when you need to move study history to another computer or protect work before browser data is cleared. The backup file is created on your device and is not uploaded anywhere. To use it at home, first move the downloaded backup file from this computer's Downloads folder to the other computer, then select Load previous work on that computer.
The cognitive science behind Recall Why this way of studying works Durable learning requires more than seeing information again. Memory becomes stronger when you retrieve knowledge without looking and return to it after some forgetting has occurred.
01
The Forgetting Curve
Definition: memory for newly learned material generally declines rapidly at first and then more slowly when it is not retrieved or reviewed.
Ebbinghaus first measured forgetting by learning lists of nonsense syllables himself. A modern replication required one participant to spend 70 hours learning and relearning lists across intervals from 20 minutes to 31 days, and reproduced the general curve.2
The often-repeated claim that everyone forgets exactly 70% within 24 hours is an oversimplification. Forgetting varies with the learner, material, prior knowledge, attention, and method of practice.
02
Active Recall (The Testing Effect)
Definition: active recall means deliberately producing an answer from memory before looking at notes or the correct response.
In a landmark experiment, students who repeatedly retrieved prose remembered about 61% one week later, compared with about 40% for students who repeatedly reread it, even though the rereaders had seen the material far more often.3
Retrieval practice has also improved performance on questions requiring comprehension and inference, not only simple fact recall.5
03
The Spacing Effect
Definition: learning is retained longer when practice is distributed across multiple sessions instead of compressed into one period of cramming.
A major review examined 839 assessments from 317 experiments reported in 184 articles. It found a robust advantage for distributed practice and showed that the most useful spacing depends on how long knowledge must be retained.4
Practice testing and distributed practice received the highest utility ratings in a broad review of ten common learning techniques.7
Putting the effects together
Spaced Repetition
Definition: spaced repetition combines retrieval practice with an adaptive schedule. A card returns after a delay, and successful recall produces progressively longer intervals. Difficulty shortens or resets the interval so effort is directed toward knowledge that is less secure.
Recall begins successful reviews at approximately 1, 3, 7, 14, and 30 days, followed by longer intervals. Selecting Review shortens the schedule; selecting Don't know resets it. Research calls the combination of retrieval and spacing successive relearning. In one program of three experiments, 533 students practiced conceptual material across repeated relearning sessions, producing more than 100,000 scored recall responses; repeated relearning substantially improved long-term retention with relatively little additional practice.6
The schedule is a study aid, not a measurement of intelligence or a guarantee of mastery. Students still need explanation, feedback, application, and practice appropriate to the subject.
Research and further reading
Bibliography: Cognitive Learning
- Ebbinghaus, Hermann. Memory: A Contribution to Experimental Psychology. Translated by Henry A. Ruger and Clara E. Bussenius. New York: Teachers College, Columbia University, 1913. Originally published 1885.
- Murre, Jaap M. J., and Joeri Dros. “Replication and Analysis of Ebbinghaus’ Forgetting Curve.” PLOS ONE 10, no. 7 (2015): e0120644.
- Roediger, Henry L., III, and Jeffrey D. Karpicke. “Test-Enhanced Learning: Taking Memory Tests Improves Long-Term Retention.” Psychological Science 17, no. 3 (2006): 249–255.
- Cepeda, Nicholas J., Harold Pashler, Edward Vul, John T. Wixted, and Doug Rohrer. “Distributed Practice in Verbal Recall Tasks: A Review and Quantitative Synthesis.” Psychological Bulletin 132, no. 3 (2006): 354–380.
- Karpicke, Jeffrey D., and Janell R. Blunt. “Retrieval Practice Produces More Learning than Elaborative Studying with Concept Mapping.” Science 331, no. 6018 (2011): 772–775.
- Rawson, Katherine A., and John Dunlosky. “Optimizing Schedules of Retrieval Practice for Durable and Efficient Learning: How Much Is Enough?” Journal of Experimental Psychology: General 140, no. 3 (2011): 283–302.
- Dunlosky, John, Katherine A. Rawson, Elizabeth J. Marsh, Mitchell J. Nathan, and Daniel T. Willingham. “Improving Students’ Learning with Effective Learning Techniques.” Psychological Science in the Public Interest 14, no. 1 (2013): 4–58.
- Brown, Peter C., Henry L. Roediger III, and Mark A. McDaniel. Make It Stick: The Science of Successful Learning. Cambridge, MA: Belknap Press of Harvard University Press, 2014.
- Oakley, Barbara, Terrence Sejnowski, and Alistair McConville. Learning How to Learn: How to Succeed in School Without Spending All Your Time Studying. New York: TarcherPerigee, 2018.
- Rawson, Katherine A., Kalif E. Vaughn, Matthew Walsh, and John Dunlosky. “Investigating and Explaining the Effects of Successive Relearning on Long-Term Retention.” Journal of Experimental Psychology: Applied 24, no. 1 (2018): 57–71.
- Carpenter, Shana K., Steven C. Pan, and Andrew C. Butler. “The Science of Effective Learning with Spacing and Retrieval Practice.” Nature Reviews Psychology 1 (2022): 496–511.