If you look at any successful medical student's flashcard deck, you'll notice something unusual: almost none of the cards use the traditional front/back format. Instead, they use cloze deletion — sentences with specific words hidden, where your job is to recall the missing piece. Here's why it dominates, and how to write cloze cards that actually teach you something.
What Cloze Deletion Is
A cloze card is a sentence with one or more words masked:
{{c1::Propranolol}} is a non-selective {{c2::beta blocker}} used to treat {{c3::hypertension}}.
During review, you see the sentence with one of the masked items hidden at a time. You recall the missing word, flip to check, rate yourself. Simple on the surface, powerful in practice.
Why It Works Better Than Front/Back
Context preserves meaning. A classic front/back card like Propranolol → non-selective beta blocker gives you a disembodied fact. A cloze card embeds the fact in a sentence that carries the clinical context — what it treats, how it works, what class it belongs to. You're not just memorizing a term; you're practicing using it.
Atomic without being fragmented. A single cloze sentence with three hidden items effectively becomes three separate review cards, each testing a different piece of knowledge, but they share a source sentence so creation is fast. You get atomic recall without the authoring tax.
Reuse the same sentence for multiple angles. One well-written sentence can spawn four or five cloze cards by varying which piece is hidden. This is why AnKing decks can cover 35,000 facts without feeling repetitive.
Better matches how you'll actually recall the information. In a real clinical scenario (or a real conversation, or a real exam), you don't encounter facts in isolation. You encounter them embedded in context and need to retrieve specifics. Cloze practice matches that retrieval pattern.
What Makes a Good Cloze Card
Hide the thing you want to learn, not the grammatical filler. Hiding "is" or "the" teaches you nothing.
Keep the surrounding context meaningful but minimal. A sentence long enough to carry the concept, short enough to review in 5 seconds.
One concept per card. If a sentence covers two unrelated facts, split it.
Avoid ambiguity. If there are three correct answers that could fit the blank, the card is broken.
Include a uniqueness signal. If five drugs could fit "is a non-selective beta blocker," add a differentiator — a side effect, an indication, a mechanism detail.
Common Mistakes
Hiding too much. A sentence with six cloze markers out of ten words isn't a flashcard, it's a crossword puzzle.
Too much context. Long clinical vignettes in a cloze card make review slow and dilute the retrieval event.
Clozing things you already know. If you can answer the sentence without thinking, the card isn't giving you a retrieval event. Cut it.
Clozing proper nouns you've never heard of. The first time you see a name, you need exposure, not retrieval. Learn it once in context before clozing it.
When to Use Cloze vs Front/Back
Cloze is better for:
- Factual content with embedded context (medicine, law, history, vocabulary in sentences).
- Lists and enumerations (name three side effects of X).
- Things where the question would feel artificial but the fact is real.
Front/back is better for:
- Vocabulary in isolation (a single word → a single definition).
- Images and diagrams (though image occlusion is often even better).
- Anything where the "prompt" is itself the thing you need to recognize.
If Your App Doesn't Support Cloze
It's not a serious spaced repetition app. Cloze is table stakes for factual learning, and its absence tells you the app was built for casual quiz use, not long-term knowledge building. This is one of the reasons Quizlet struggles as a long-term tool: its card model doesn't naturally accommodate cloze at the scale medical students need.
Neurako supports cloze deletion natively, including multi-cloze cards that generate multiple review events from a single source sentence.
Sources
- Woźniak, P. Effective learning: twenty rules of formulating knowledge. supermemo.guru/wiki
- Karpicke & Roediger (2008), The critical importance of retrieval for learning, Science 319.