Teach17

Flashcards are probably one of the most popular revision methods used by school pupils.

They are also one of the easiest to use badly.

Making 200 beautifully colour-coded cards is not the same as learning 200 things. Reading the answer on the back, thinking “yes, I knew that”, and moving to the next card can create the comforting feeling that revision is working without requiring very much retrieval from memory.

Used properly, however, flashcards can be extremely useful.

The reason has little to do with the cardboard.

Good flashcard revision combines two of the best-supported ideas from research into learning: retrieval practice and spacing. In a major review of learning techniques, Dunlosky and colleagues rated practice testing and distributed practice as having high utility across a wide range of learning situations.

So how should pupils actually use flashcards?

Here are 17 ways.

1. Put a question on the front

A heading is not necessarily a good flashcard.

“Macbeth”

“Cell division”

“The Cold War”

“Trigonometry”

These tell you the topic, but they don’t tell your brain what it needs to retrieve.

Turn the topic into a question.

Who first describes Macbeth as “brave”?

What happens during mitosis?

Why did relations between the USA and USSR deteriorate after the Second World War?

When should you use the sine rule?

The clearer the question, the clearer the retrieval task.

2. Don’t turn the card over straight away

This is the most important habit.

Read the question.

Stop.

Try to remember.

Only then check the answer.

That small period of mental effort is the whole point.

Research into retrieval practice has repeatedly found benefits from trying to retrieve previously learnt material rather than simply studying it again. A systematic review of retrieval practice in actual schools and classrooms examined 50 experiments involving 5,374 learners; 57% of the reported effects were medium or large. Benefits appeared across different educational levels, subjects and test formats.

3. Actually produce the answer

“I know this one” isn’t an answer.

If the card asks for three consequences of an event, say all three.

If it asks for a definition, give the definition.

If it asks for a formula, write the formula.

If it asks for a quotation, retrieve the quotation.

If it asks for French vocabulary, say the French word before looking.

Recognition can feel like knowing.

Retrieval shows whether you actually know.

4. Keep one main idea on each card

Avoid trying to turn an entire revision-guide page into a flashcard.

A card containing twelve bullet points in tiny handwriting is really a miniature textbook.

Break the material down.

Instead of:

“The causes of the First World War”

you might have:

How did militarism contribute to tension before 1914?

How did alliances increase the risk of a European war?

Why was the assassination of Archduke Franz Ferdinand important?

What role did nationalism play?

Now each card tests something identifiable.

5. Make some answers short

Not every answer needs a paragraph.

Flashcards are particularly effective for information that pupils need to retrieve quickly:

definitions

dates

formulae

vocabulary

key people

quotations

terminology

processes

symbols

case-study facts

musical terms

grammatical rules

The ability to retrieve these things quickly frees attention for more complicated thinking later.

6. But include some “why?” and “how?” cards too

Flashcards should not become nothing more than a collection of one-word facts.

Compare:

When was the Battle of Hastings?

with:

Why did William win the Battle of Hastings?

Or:

What is a metaphor?

with:

Why might a writer use this metaphor?

Or:

What is inflation?

with:

How might rising inflation affect households?

Good revision needs both factual knowledge and connections between ideas.

Research into retrieval practice has found benefits that extend beyond simple verbatim recall, although flashcards should not be expected to teach every form of complex thinking on their own.

7. Say answers aloud

This is one of the simplest ways to improve a flashcard session.

Question:

What are three functions of the skeleton?

Don’t think:

“Yes, I know those.”

Say them.

Support.

Protection.

Movement.

Speaking forces you to commit to an answer.

It also makes it much harder to fool yourself.

8. Sometimes write the answer down

Some knowledge needs to be produced accurately on paper.

Write the quadratic formula.

Spell the Spanish word.

Write the chemical equation.

Write the quotation.

Draw the labelled diagram.

Write the grammatical construction.

Sketch the graph.

If your examination requires you to produce something, it makes sense for at least some of your revision to require you to produce it too.

9. Use images as questions

A flashcard does not need to consist of two blocks of text.

Put an unlabelled diagram on the front.

Or a map.

A graph.

A painting.

A historical photograph.

A musical symbol.

An anatomical structure.

A geometric diagram.

Then ask:

What is this?

Label it.

What does the graph show?

What happens next?

What feature can you identify?

What conclusion could you draw?

This makes flashcards useful across almost every subject.

10. Use them both ways

Imagine a language card:

Front: chien
Back: dog

Being able to recognise chien does not guarantee that you can produce chien when you are given “dog”.

So reverse some cards.

This works outside languages too.

Instead of always asking:

What does “dramatic irony” mean?

also ask:

What term describes a situation where the audience knows something a character does not?

Instead of:

What happened in 1066?

try:

In which year did the Battle of Hastings take place?

Changing the direction of retrieval can reveal knowledge that was less secure than it appeared.

11. Don’t throw away an “easy” card too quickly

You answered it correctly.

Excellent.

But that doesn’t mean it is permanently learnt.

Kornell and Bjork studied the common flashcard strategy of removing cards once learners believed they knew them. Across four experiments, dropping apparently learnt cards carried a cost to learning.

So don’t necessarily bin the card.

See it less often.

But see it again.

12. Use three piles

You do not need an elaborate revision algorithm.

Try:

Know it

Nearly know it

Don’t know it

The “nearly” pile is especially interesting.

These are often the things pupils recognise instantly but cannot quite retrieve accurately.

Spend more time on the difficult cards, while continuing to revisit the supposedly secure ones occasionally.

13. Space the cards over days and weeks

Doing the same pack five times tonight may make you feel extremely fluent with it.

The problem is that your examination probably isn’t tonight.

Spacing learning over time is one of the most consistently supported findings in learning research. Cepeda and colleagues’ influential review examined 839 assessments drawn from 317 experiments and found that the interval between learning episodes matters for later retention.

More recent research examining spacing specifically in classroom learning has also found an advantage for distributed over massed practice. A 2025 meta-analysis of applied classroom research reported a moderate overall benefit for distributed practice.

You don’t need to obsess over a perfect schedule.

A simple pattern might be:

Day 1

Day 3

Day 7

Day 14

A few weeks later

The important principle is:

come back.

14. Mix old cards with new ones

Suppose you are revising Geography.

You could do 50 cards on rivers.

But later in your revision, it can be useful to mix:

rivers

coasts

urban issues

hazards

ecosystems

Now your brain has to identify what knowledge is required.

The same can work in Maths, History, Science, English, Business, Psychology, Languages and many other subjects.

Don’t make every revision session completely predictable.

There is evidence supporting interleaved practice in some learning situations, although its evidence base is less universally strong than retrieval and spacing. Dunlosky and colleagues therefore rated interleaving as moderate rather than high utility.

15. Don’t spend all evening making the cards

This may be the biggest flashcard trap of all.

Monday’s revision plan:

6.00 pm: choose coloured pens.

6.15 pm: find the perfect cards.

6.30 pm: write headings.

7.00 pm: underline headings.

7.30 pm: add diagrams.

8.00 pm: arrange cards into piles.

8.30 pm: stop.

The cards may look magnificent.

But almost no retrieval has taken place.

Making flashcards can help you organise material, but creating the resource should not consume the time that should be spent using it.

Ask yourself:

Am I revising, or am I preparing to revise?

16. Move from flashcards to exam questions

This is crucial.

Suppose a pupil knows:

20 quotations from Macbeth.

Every required formula in Maths.

50 dates from History.

100 words of French vocabulary.

Every definition in Economics.

Excellent.

Now comes the next stage.

Can they use them?

Flashcards cannot replace:

essay writing

mathematical problem solving

source analysis

extended explanations

translation

data interpretation

practical skills

evaluation

timed responses

past papers

The research supporting retrieval practice is strong, but that doesn’t mean one retrieval method is sufficient for every learning goal. Dunlosky and colleagues themselves define practice testing broadly, including flashcards, practice questions and other forms of active recall.

Flashcards help build knowledge.

Exam questions help pupils practise doing something with it.

You need both.

17. Keep sessions short enough to stay honest

You don’t necessarily need an hour of flashcards.

Fifteen focused minutes can be excellent revision.

For example:

20–30 cards.

Question.

Pause.

Retrieve.

Check.

Sort.

Repeat the difficult ones.

Stop.

Return another day.

Then follow the flashcards with a few questions where you have to apply what you have retrieved.

That is likely to be much more productive than absent-mindedly flicking through 150 cards while watching television.

The biggest flashcard mistake: confusing familiarity with knowledge

This deserves its own warning.

Imagine seeing this card for the tenth time:

Front:

Who wrote An Inspector Calls?

Before you have even properly read the question, you turn it over.

J. B. Priestley.

“Yep. Knew that.”

Perhaps you did.

Perhaps you didn’t.

The problem is that seeing the answer feels incredibly familiar.

The same thing happens when pupils repeatedly reread textbooks, revision guides and notes.

The page begins to look familiar.

The words look familiar.

The diagram looks familiar.

That creates confidence.

But in an examination the answer isn’t sitting underneath the question waiting to be uncovered.

You have to retrieve it.

This is why the distinction between recognition and retrieval matters so much.

A simple 20-minute flashcard routine

You don’t need a complicated app or revision system.

Take approximately 20–30 cards.

Read the first question.

Wait.

Answer it aloud or on paper.

Turn the card over.

Check carefully.

Sort it into:

Know it

Nearly know it

Don’t know it

Continue.

At the end, return to the difficult cards.

Then put the cards away.

Come back to them on another day.

After several sessions, answer some proper questions on the topic.

That’s it.

Simple revision does not necessarily mean ineffective revision.

Paper cards or an app?

Both can work.

Paper cards are simple, cheap and difficult to distract yourself with.

Digital systems can hold hundreds of cards and make spaced repetition easier to organise.

But downloading the “best” flashcard app isn’t going to transform revision if you repeatedly reveal the answers without attempting to retrieve them.

The technology isn’t the important bit.

The thinking is.

Should pupils make their own flashcards?

Often, yes.

Making your own cards allows you to choose questions that match what you are learning and identify the things you personally find difficult.

But don’t turn this into a rule that every pupil must spend hours copying a specification onto hundreds of cards.

Teacher-produced cards can also be useful.

So can shared decks.

The test is not:

“Did I make this card myself?”

It is:

“Does this card ask me something worth retrieving?”

What should teachers do?

Flashcards can also be explicitly taught.

Don’t simply tell a Year 11 class:

“Make some flashcards for homework.”

Show them what a poor card looks like.

Then improve it together.

Show pupils how to:

write a specific question

keep answers manageable

include diagrams

retrieve before checking

sort cards according to confidence

return to cards later

mix old and new material

move on to application questions.

Revision strategies are skills.

We should not assume pupils automatically know how to revise simply because an examination is approaching.

What does the research actually tell us?

There are good reasons for teachers to recommend flashcards, but the claim needs to be precise.

The evidence does not show that pieces of card have some special effect on memory.

It shows that retrieving knowledge and spreading learning over time can improve retention.

Dunlosky and colleagues’ major review rated practice testing and distributed practice as high-utility learning techniques.

Agarwal, Nunes and Blunt’s systematic review looked specifically at retrieval practice in real classrooms. They screened nearly 2,000 abstracts and analysed 50 experiments involving 5,374 learners. Retrieval practice produced benefits across different subjects, ages and classroom conditions, although the authors also highlight limitations in where much of the research has been conducted.

Cepeda and colleagues’ large review provides strong evidence for spacing learning over time rather than concentrating all study into one period.

And newer classroom-focused research continues to support the value of distributed practice, while reminding us that effects vary according to the learning situation.

That is a much more useful message than simply saying:

“Flashcards work.”

The Teach17 takeaway

Flashcards work best when they stop being something you read and become something that makes you think.

So don’t judge revision by the size of your flashcard pile.

Don’t judge it by how colourful the cards are.

Don’t even judge it by how long you sat at your desk.

Ask a better question:

How much did I have to retrieve from memory?

Then ask another:

Can I use that knowledge when the question looks different?

If the answer to both is yes, your revision is probably heading in the right direction.

Research and further reading

Agarwal, P. K., Nunes, L. D. and Blunt, J. R. (2021). Retrieval Practice Consistently Benefits Student Learning: A Systematic Review of Applied Research in Schools and Classrooms. Educational Psychology Review, 33, 1409–1453.

Cepeda, N. J., Pashler, H., Vul, E., Wixted, J. T. and Rohrer, D. (2006). Distributed Practice in Verbal Recall Tasks: A Review and Quantitative Synthesis. Psychological Bulletin, 132(3), 354–380.

Dunlosky, J., Rawson, K. A., Marsh, E. J., Nathan, M. J. and Willingham, D. T. (2013). Improving Students’ Learning With Effective Learning Techniques: Promising Directions From Cognitive and Educational Psychology. Psychological Science in the Public Interest, 14(1), 4–58.

Kornell, N. and Bjork, R. A. (2008). Optimising Self-Regulated Study: The Benefits – and Costs – of Dropping Flashcards. Memory, 16(2), 125–136.

Mawson, R. D. and Kang, S. H. K. (2025). The Distributed Practice Effect on Classroom Learning: A Meta-Analytic Review of Applied Research.