# How to turn a chapter into flashcards that actually work

> Most flashcards fail because they copy the page. Make one card per fact, ask a question rather than name a term, and only card what you got wrong.

Canonical: https://dev.swirlai.app/blog/how-to-turn-a-chapter-into-flashcards
Last updated: 2026-10-27

Do not card the whole chapter. Read it once, close it, then write down what you remember. Make one card per fact you could not recall, phrased as a question with one answer. Ten good cards beat sixty copied sentences, because a card you already know wastes the same four seconds as a card you need.

A chapter becomes sixty flashcards, most of them sentences copied off the page, and by Wednesday you have reviewed none of them. The problem is not the app. It is that a card copied from a paragraph tests whether you recognise the paragraph, not whether you know the thing.

## Read once, then close the book

Read the chapter properly, once, without a highlighter. Then close it and write down everything you remember on a blank page. What lands on that page is what you already know. The blank space around it is the deck.

## One card, one fact

A card should have a single thing on the back. If the answer needs three sentences and a diagram, split it into three cards. If the front is a term and the back is a definition, rewrite the front as a question: not 'osmosis' but 'what happens to water when a cell is in a salty solution?'

- One fact per card, never a paragraph.
- A question on the front, not a heading.
- The answer in your own words, because copying the page copies the problem.
- A date or a source on anything you might have to defend.

## Only card what you missed

Cards you already know are not studying, they are scrolling. Keep a small deck of the things you got wrong this week and let the rest go. A deck of twelve cards you keep failing is worth more than two hundred you keep passing.

## Review out loud, not by tapping

Say the answer before you flip the card. Tapping 'show answer' and thinking yes, I knew that is how a deck lies to you. If you cannot say it out loud, you do not know it yet.

## When to stop making cards

If you have spent more time making the deck than reviewing it, stop and review. The deck is not the study. The deck is the list of things to study, and a list you never read is a hobby.

## Do this in Swirl

Ten cards you keep failing are worth more than two hundred you keep passing.

**A normal chat:** A normal chat summarises the chapter into cards you will never review. Swirl quizzes first, then cards only the gaps.

Prompt: Make flashcards from this chapter, but only for the parts I get wrong. Quiz me first, one question at a time, then card what I missed.

[Try this in Swirl](https://dev.swirlai.app/?utm_source=blog&utm_medium=how-to-turn-a-chapter-into-flashcards)

### How many cards should a chapter make?

Ten to twenty for a normal chapter. If you are past thirty, you are carding the page instead of the ideas, and you will not review them.

### Should I use a flashcard app or paper?

Paper for making them, an app for reviewing them if you will actually open it. The app's spaced repetition is worth more than its editor.

### Can an AI make the cards for me?

It can, and it is faster, but ask it to make cards only from what you got wrong, not the whole chapter. A deck you did not think about is a deck you will not remember making.

## Related

- [How to study for an exam without rereading everything](https://dev.swirlai.app/blog/how-to-study-for-an-exam-without-rereading)
- [How to revise when you don't know where to start](https://dev.swirlai.app/blog/how-to-revise-when-you-dont-know-where-to-start)
- [How to summarise a PDF without losing the point](https://dev.swirlai.app/blog/how-to-summarise-a-pdf)