How to use the 90-90-1 rule and active recall for exam prep

Learn three Korean study methods that help you focus deeply and remember more: the 90-90-1 rule, teaching a topic out loud, and active recall with a timer. It suits students preparing for any exam who want to study smarter, not longer. You only need your notes, a timer and a quiet spot.

HARDEST EXAM? Use These 3 Korean Methods To Prepare, by glow of desire on YouTube. 6 min 36 s.

4 chapters. Tap a step to jump to it.Chapters from the creator
Video length
6 min 36 s
Time to do it
30 minutes
Difficulty
Easy
Steps
8

What you need

Steps

  1. Pick one subject and one chapter you need to learn. Clear your desk of distractions and put your phone on silent or in another room.

  2. Set a timer for 90 minutes and study that one topic with full focus. No messages, no switching subjects, no breaks during this block.

  3. When the 90 minutes end, take a 90 minute break away from your desk. Eat, walk or rest so your brain can process what you studied.

  4. Repeat one more 90 minute study block after the break. The 90-90-1 rule means two focused blocks and one full break in a day.

  5. Close your notes and explain the topic out loud as if teaching a classmate. Use simple words and fill gaps in your explanation.

  6. Where you get stuck, go back to the notes, relearn that part, then explain it again until it flows without looking.

  7. Test yourself with active recall: write down everything you remember on blank paper, then check your notes for what you missed.

  8. Use a timer for short recall rounds, such as 5 minutes of writing then 2 minutes of checking. Repeat for each section of the chapter.

Tips and common mistakes

Keep each 90 minute block to one topic so you do not waste focus switching subjects.

Explaining out loud feels awkward at first, but it quickly shows which parts you only half know.

Test yourself before rereading notes, since recall practice sticks better than passive reading.

If 90 minutes feels too long at first, start with 45 minute blocks and build up.

Questions

What is the 90-90-1 rule?

It means two 90 minute focused study blocks with a 90 minute break between them, giving you one solid study day. The long break helps your brain consolidate what you learned.

How is active recall different from rereading?

Active recall means pulling information from memory, for example by writing it on blank paper or answering questions. Rereading feels easy but does not test whether you actually know the material.

Do I need a special timer app?

No. Any phone timer or kitchen timer works. A study timer app just makes it easier to track repeated focus and break rounds.

This guide was drafted from the video's details and general task knowledge. It has not been checked against the full video. Check the video and relevant product instructions before following a procedure. Report a correction.

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