How to Make Good Flashcards: 10 Weak Cards Rewritten

To make good flashcards, put one idea on each card, ask a question with exactly one right answer, and keep the answer short enough to check in a few seconds. Then answer each card before you flip it, and bring back the ones you miss sooner. If you’d rather start from a draft, the flashcard generator from notes makes cards from your own notes, and the rules below are how to fix them.

1. Ask a question, not a topic heading.
2. Test one idea per card, and split lists into separate cards.
3. Make sure only one answer is right.
4. Write each card so it makes sense when the deck is shuffled.
5. Keep the answer out of the question.
6. In a fill-in-the-blank (cloze) card, blank one key term.
7. Keep answers short and in your own words.
8. Add cards that make you use a fact, not only repeat it.

Rules 2 and 7 follow what Piotr Wozniak called the “minimum information principle” in his twenty rules for formulating knowledge (SuperMemo, 1999), which also warn against cards that ask for sets and lists. Simple cards are quicker to answer, easier to mark honestly and easier to schedule.

Ten weak flashcards rewritten

The cards below come from one short source passage on how substances move into and out of cells, a topic in GCSE Biology and AP Biology. We wrote the passage from facts in OpenStax Biology 2e (sections 5.2 and 5.3), so every answer can be checked against it.

Particles move into and out of cells in three ways. In diffusion, particles spread from where they are more concentrated to where they are less concentrated. Diffusion is passive, so the cell spends no energy on it, and it is faster when the concentration gradient is steeper, the temperature is higher or the membrane’s surface area is larger. Osmosis is the movement of water from a dilute solution to a more concentrated solution across a partially permeable membrane. A red blood cell placed in pure water takes in water, swells and can burst. A plant cell in pure water swells too, but its cell wall stops it bursting and the water pressure makes it firm. Active transport moves substances against their concentration gradient, from lower to higher concentration, using carrier proteins and energy from ATP.

Each row shows a weak card, a better version and the rule behind the fix, numbered as in the list above. The front of each card comes before the arrow, the back after it.

Weak card	Better card	Rule behind the fix
Diffusion → (the whole paragraph)	Which way do particles move in diffusion? → From higher to lower concentration	Rule 1. Ask a question, not a heading. A one-word front gives you nothing to retrieve.
Explain how substances move in and out of cells → (all three processes)	Does diffusion use energy from the cell? → No, it is passive (plus one card each for osmosis and active transport)	Rule 2. One idea per card. A miss on a three-part answer doesn’t tell you which part you forgot.
What happens to a cell in pure water? → It bursts	What happens to a red blood cell placed in pure water? → It takes in water, swells and can burst	Rule 3. Only one answer can be right. A plant cell doesn’t burst, so name the cell.
Why doesn’t it burst? → The cell wall	Why doesn’t a plant cell burst in pure water? → Its cell wall stops it	Rule 4. Make the card stand alone. “It” means nothing once the deck is shuffled.
Does active transport use carrier proteins and ATP to move substances against the gradient? → Yes	What does active transport use to move substances against their concentration gradient? → Carrier proteins and energy from ATP	Rule 5. Keep the answer out of the question. A yes or no card you can answer by reading it tests nothing.
Name three factors that affect the rate of diffusion → Gradient, temperature, surface area	How does a higher temperature change the rate of diffusion? → It makes diffusion faster (one card per factor)	Rule 2. Break a list into single cards. A list is the hardest thing to recall in one go.
____ is the movement of ____ from a dilute to a more ____ solution across a partially ____ membrane	Osmosis is the movement of ____ across a partially permeable membrane → Water	Rule 6. Blank one key term. Four blanks turn recall into guessing from grammar.
What is osmosis? → (a 40-word sentence copied from the textbook)	What is osmosis? → Water moving from a dilute to a more concentrated solution across a partially permeable membrane	Rule 7. Short answers in your own words. You can only mark yourself honestly against an answer you can hold in your head.
Diffusion vs osmosis → (a comparison table)	How is osmosis different from diffusion in general? → Osmosis is the diffusion of water only, across a partially permeable membrane	Rule 3. Only one answer can be right. A “compare” card has many, so ask for one named difference.
Active transport → Against the concentration gradient	A cell takes in glucose when there is already more glucose inside than outside. Which process must it use? → Active transport, because glucose is moving against its gradient	Rule 8. Make the card use the fact. Recognising a definition is not the same as applying it.

Ten weak cards became 14 good ones, because two of them split into three cards each. Small cards take longer to write and less time to review.

How to study the cards

A card only becomes recall practice when you answer before you look.

1. Read the question side.
2. Say or write the answer from memory.
3. Flip the card and mark yourself honestly.
4. Bring missed cards back sooner.
5. Space out cards you have answered correctly several times.

Roediger and Karpicke (2006) found that testing yourself gave better delayed recall than restudying the same material, and Dunlosky and colleagues (2013) rated practice testing and spaced practice as the most useful of ten study techniques. Flashcards cover the recall part. Mix them with past-paper questions and worked problems for the exam skills cards can’t test, and see science flashcards for subject examples.

Make a first draft faster from your own notes

We make Aripsy, and it drafts flashcards from a section of notes you paste or upload. Use it for the typing, then apply the rules above.

1. Open the flashcard generator from notes and paste one focused section.
2. Choose the subject, level and exam board.
3. Generate a small set.
4. Check every card against your source, and edit or delete the weak ones.
5. Answer the cards from memory, then return to the source for anything uncertain.

A free account makes up to 10 flashcards per set, with 15 study packs a month (up to 5 a day), and you can paste up to 5,000 words at a time. Without an account you can try one pack a day with a 3-card preview. Pro makes up to 30 cards per set.

If you already review in Anki, Aripsy Pro exports your cards as a text file that Anki imports (how to export to Anki), and the free Quizlet to Anki converter moves a Quizlet set you already have. To compare apps, see the best flashcard apps for students in 2026.

FAQ

How many flashcards should I make per topic?

Make as many as the topic has separate testable ideas, and no more. The passage above gives 14. If a topic produces hundreds, split it into smaller sections and check each batch before you review it.

Should I write flashcards by hand or use AI?

Writing them yourself makes you decide what matters, which is part of learning the topic. An AI draft saves the typing but still needs that judgement when you check it, so use whichever gets you to checked cards faster and spend the time saved on answering them. Paper or app matters less than the card itself, but an app schedules the reviews for you.

Should flashcards be questions or terms?

Questions, in most subjects. A term on the front (“Osmosis”) lets you recognise the answer without retrieving it, while a question (“What moves across the membrane in osmosis?”) makes you produce it. Term cards still work for vocabulary in a new language, where the word itself is what you need.

Can I make flashcards online for free?

Yes. Aripsy’s free plan makes up to 10 flashcards per set from pasted notes, with 15 study packs a month. Anki is also free on desktop and Android, but you write or import every card yourself.

How do I get my flashcards into Anki?

On Aripsy Pro, choose Anki in the export menu and download the text file. Import it into Anki and check that the columns map to Front, Back and Tags. The Anki export guide has the steps.

Are AI flashcards accurate?

Not always. AI can drop context, misread a source or write a plausible answer that is wrong. Check each card against your notes or textbook before you memorise it.

Next step

Pick one topic, write or generate 10 to 20 cards, fix them with the eight rules, and answer them from memory tomorrow.

Make flashcards from your notes with Aripsy

Sources

• Piotr Wozniak, “Effective learning: Twenty rules of formulating knowledge”, SuperMemo, 1999, rules 4, 9 and 10, read 4 November 2026.
• OpenStax Biology 2e, 5.2 Passive Transport and 5.3 Active Transport, the facts behind the source passage (the passage is our own wording), read 3 November 2026.
• Roediger and Karpicke, Test-Enhanced Learning, Psychological Science, 2006
• Dunlosky, Rawson, Marsh, Nathan and Willingham, Improving Students’ Learning With Effective Learning Techniques, 2013