How to Remember What You Learn

Start with an answer from memory

Retrieval practice means trying to bring information to mind rather than keeping the answer in view. Close the book, explain an idea aloud, sketch a process, or answer a question before checking your notes.

Roediger and Karpicke studied students learning prose passages. At tests two days or a week later, prior recall testing outperformed further reading, even though repeated reading had increased confidence. That result supports using recall practice alongside reading; it does not establish that every quiz format will have the same effect.

Source: Roediger & Karpicke (2006): Test-enhanced learning

Turn one fact into a useful question

Suppose you are learning about the solar system. Write “Which planet is the largest in our solar system?” on a card, with “Jupiter” and a link to NASA on the back. Answer before turning it over. Once that is easy, add a new question that asks you to explain an idea from the source.

1. Read a focused explanation.
2. Close it and attempt a question.
3. Check the answer and add a short correction if needed.
4. Return to the question in a later session.

Source: NASA: Jupiter

Spread review over time

Spacing means returning to material in separate sessions. Cepeda and colleagues’ review of verbal-learning experiments found that the useful gap between study sessions depended on how long information needed to be retained. There is no single ideal schedule for every topic and goal.

For an informal starting routine, review a question the next day, a few days later, and again the following week. This is our suggested starting schedule, not an interval proven optimal by that paper. Adjust it: return sooner to a question you keep missing, and allow longer gaps for one you can explain comfortably.

Source: Cepeda et al. (2006): Distributed practice in verbal recall tasks

Make the correction part of the session

A wrong answer gives you something specific to inspect. Compare it with the source and write the corrected version. If two ideas are getting mixed up, put them next to each other and state the difference clearly.

McDaniel and colleagues reported educational experiments in which short-answer testing supported later performance; one experiment also found a benefit from immediate feedback. This is a reason to include checking and correction in your practice, rather than treating the score as the end of the task.

Source: McDaniel, Roediger & McDermott (2007): Generalizing test-enhanced learning from the laboratory to the classroom

Keep a small review list you can actually use

Start with a handful of questions from a topic that matters to you. If the review list becomes too long, pause the additions and revisit what you already have. A useful note is one you return to and understand, not one you merely save.

Avoid turning every sentence into a separate card. Keep the main idea, the detail you want to retain, and the source you can consult again. Use reading to build context and recall practice to check what you can bring back without help.

Check progress with an explanation

After a week, choose a few questions without looking at the answers first. Can you answer them and explain why? Keep track of the specific gaps instead of relying on a general feeling of familiarity. If a question is still difficult, make the next attempt smaller or return to the original explanation.