Recall and Spaced Practice

Introduction

The two best-supported study methods are retrieval practice (testing yourself) and spaced practice (spreading study over time). Together they are very powerful. They feel harder than rereading, and that effort is part of why they work.

Retrieval practice

Retrieval means pulling information out of memory before you look at the answer.

Ways to do it:

• Blank-page recall: close the book, write or sketch everything you remember about a topic, then check and fill gaps.
• Flashcards: question on one side, answer on the other. Say or write the answer before flipping.
• Practice questions and past papers.
• Self-made quizzes: turn headings and key ideas into questions.
• Explain aloud to an imaginary student, or a real one.
• Mix topics in a session to practise choosing the right method.

Tips:

• Make cards about ideas, not just words: "Why does the moon have phases?" rather than "Moon phases".
• Keep each card focused on one fact or idea.
• Check your answers honestly. If you got it wrong, say what you will do differently.
• Use digital flashcard tools or paper cards. Free options exist.

Spaced practice

Instead of studying a topic once for four hours, study it for 40 minutes on six different days. The gaps allow some forgetting, and the effort of recalling again makes memory stronger.

A simple schedule for new material:

Day 0   learn it
Day 1   quick retrieval
Day 3   retrieval
Day 7   retrieval
Day 14  retrieval
Day 30  retrieval

If you forgot a lot, shorten the gap. If it feels easy, lengthen it. Some flashcard apps automate this with spaced repetition algorithms.

With an exam date, work backwards: plan several rounds of review before it, with the final ones closer together.

Interleaving

Mixing different types of problems or topics in one session, rather than doing 20 of the same kind, helps you learn to choose the right method. It feels harder and slower, but often leads to better results later.

Make it a routine

• Begin each session with five minutes of recall from the last session.
• End by writing three questions you could ask yourself next time.
• Keep a list of things you struggled with and revisit them first.

Try it yourself

Choose a topic you studied this week. Do a blank-page recall now. Check it, then make ten flashcards of the gaps, and schedule reviews at day 1, 3 and 7.

Summary

• Retrieval practice means recalling before checking, using blank pages, flashcards and questions.
• Spacing reviews over days and weeks beats cramming.
• Begin each session with recall, mix topics and revisit weak points.