Sentence Cards

Definition:

Sentence cards are SRS (spaced repetition software) flashcards in which the review prompt consists of a complete target-language sentence containing one item the learner aims to acquire — a word, phrase, or grammar point — with the meaning or reading of that target item revealed on the card’s back. They are the recommended card format in Matt vs Japan’s methodology and the Refold roadmap, preferred over word cards because they provide the contextual cues through which words are actually encountered and used in real language. A sentence card for the Japanese word 蓬莱 (hōrai) would show the full sentence in which that word appears on the front, with the reading and meaning on the back — giving the learner the same contextual information they would have when reading actual text, rather than testing the word in isolation. Sakubo is built specifically for the sentence card workflow.

The Core Concept: 1T (One-Target) Sentences

The optimal sentence card format in the Refold methodology is the 1T sentence (one-target sentence): a sentence in which:

• All vocabulary in the sentence is already known to the learner, except for one target item
• The target item’s meaning can be inferred from the sentence context and from the back of the card
• The sentence is real, native-language material — taken from an actual text, show, or audio source rather than constructed for study purposes

The logic of 1T: if more than one word per sentence is unknown, the learner cannot understand the context well enough to meaningfully learn the target word. If the sentence is constructed (textbook-style), it lacks the authenticity that enables naturalistic acquisition. The 1T format optimizes for exactly one unknown per card, making each review efficient.

Front and Back Structure

Standard sentence card format:

Front:

“`

祖母はその島を蓬莶だと言っていた

[Optional: audio clip of the sentence]

“`

Back:

“`

Reading: 蓬莶（ほうらい）

The legendary island of immortals in East Asian mythology; here used as an allusion to something impossibly difficult to obtain

[Optional: image from the source]

“`

In some Refold formats, the anime or novel screenshot is added as an image on the front, giving both visual and audio context.

Why Context Matters for Vocabulary Acquisition

The argument for sentence cards over word cards rests on several lines of evidence:

1. Words are not stored in isolation. Vocabulary in the mental lexicon is embedded in networks of semantic, syntactic, collocational, and pragmatic associations. Learning a word in sentence context activates more of its natural associative network than seeing it in isolation.

1. Authentic exposure patterns. You will always encounter a word in a sentence when reading or listening — never as an isolated word. SRS cards that mirror this encounter format create retrieval conditions that match natural use conditions.

1. Grammar acquisition through exposure. Sentence cards reviewed over thousands of repetitions provide sentence-level pattern exposure. Implicit grammar knowledge is built not through rule study but through sentence pattern internalization — sentence cards expose rules in their natural context.

1. The distinction between knowing a word and understanding a word in use. Knowing that 曖昧 means “ambiguous” is different from knowing how it’s used in Japanese sentences — with what verbs, in what register, in what types of predicates. Sentence exposure provides this pragmatic knowledge.

Sentence Cards vs. Word Cards

Neither format is universally superior for all learners at all stages; the Refold position is that sentence cards become preferable once the learner has enough grammatical foundation to understand basic sentence structure.

History

Early 2000s — Anki’s sentence format support. The Anki SRS platform (launched 2006) natively supports multi-field cards with sentence templates, making sentence card creation technically simple. Early adopters immediately began experimenting with sentence card formats.

2006–2010 — AJATT community. Khatzumoto’s AJATT method, while not rigorously defining sentence vs. word cards in the way later methodologists would, used Japanese sentence examples extensively and promoted mining Japanese content for card material.

2010s — Matt vs Japan. Matt Colwell (Matt vs Japan) became the most prominent advocate for the 1T sentence card format, producing detailed video explanations of exactly what makes a good sentence card, what 1T means, and how sentence card quality affects acquisition outcomes.

2020 — Refold codification. The Refold roadmap formalized sentence cards as the recommended format for Stage 2 vocabulary acquisition, specifying the 1T requirement and providing guidance on mining, card format, and review behavior.

Common Misconceptions

“Any sentence with the target word works as a sentence card.”

The 1T requirement (one unknown per sentence) is central. A sentence with three unknown words is not a good 1T sentence card — the learner cannot reliably use context to understand the target word because the context itself is unclear. Card quality, not quantity, determines acquisition efficiency.

“Sentence cards are for studying grammar.”

Sentence cards primarily teach vocabulary in context. Grammar acquisition through sentence card exposure is a secondary benefit — an implicit outcome of seeing grammar structures repeatedly in natural contexts — not the primary purpose of sentence card review.

Criticisms

1. High creation burden. Finding, mining, editing, and formatting good 1T sentence cards is substantially more work than creating word cards. The barrier to building a large deck is correspondingly higher, which can limit initial momentum especially for beginners.

1. Judgment difficulty in review. Evaluating whether you “know” a sentence card is subjective. With word cards, knowing the translation is a clear pass/fail. With sentence cards, you might understand the sentence without fully knowing the target word’s other uses, collocations, or nuances — the review criterion is less precise.

1. Stage-dependency. Sentence cards are most effective when the learner has enough grammar and vocabulary to understand the sentence context. For true beginners, sentence cards may produce comprehension failure across the whole sentence, not just the target word — undermining the context advantage.

Social Media Sentiment

Sentence cards are widely endorsed in Refold communities, r/ajatt, and among serious Anki users in Japanese-learning communities. The most common community objections:

• “Mining sentences is too much work” — leads to abandoning card creation and falling behind on immersion?SRS pipeline
• “I can’t find good 1T sentences in what I’m reading” — difficulty finding cards at the right level for someone’s current comprehension
• “I just use Jisho sentences” — community skepticism about constructed example sentences vs. native material sentences

Last updated: 2026-04

Practical Application

1. Mine from active immersion. The best sentence cards come from content you’re actively immersing in — shows, podcasts, books you’re already studying. The emotional connection to the source increases retention compared to random web sentences.

1. Enforce the 1T rule strictly. When mining, skip sentences where you don’t understand more than one item. Create a card only when you understand everything in the sentence except the target word. This seems conservative but produces much faster per-card acquisition rates.

1. Use Sakubo for sentence card workflow. Sakubo is designed for the sentence card + immersion workflow, making it easy to add mined sentences, attach audio, and review sentences with context. The SRS algorithm handles scheduling so you review each card at optimal intervals.

1. Review: judge understanding, not translation. When reviewing a sentence card, your criteria should be: “Can I understand this sentence as naturally as I would in the content?” — not “Can I produce the English word for the target?” This more closely mirrors how the word will actually be used.

Related Terms

• Word Cards
• Sentence Mining
• Spaced Repetition
• Anki
• Active Immersion
• Refold

See Also

• Word Cards — The simpler alternative format; comparison between word and sentence cards is the central debate in L2 SRS methodology
• Sentence Mining — The process of creating sentence cards from authentic content; the feeding process for sentence card decks
• Active Immersion — The immersion practice that generates material for sentence card mining
• Spaced Repetition — The algorithm underlying all SRS card review, including sentence cards
• Anki — The dominant SRS platform for sentence card decks
• Sakubo

Research

• Webb, S. (2007). The effects of repetition on vocabulary knowledge. Applied Linguistics, 28(1), 46–65. [Summary: Research on repetition and vocabulary acquisition — examines how many encounters are required for incidental learning of words from context; provides evidence base for the assumption that sentence card review (repeated contextual encounters) builds vocabulary.]
• Laufer, B., & Shmueli, K. (1997). Memorization of words in isolation, in sentence context and in a text. Canadian Modern Language Review, 54(2), 271–284. [Summary: Direct comparison of memory for words in isolation vs. sentence context vs. text — finds context improves retention, providing empirical support for sentence card format over word card format.]
• Prince, P. (1996). Second-language vocabulary learning: The role of context versus translations as a function of proficiency. The Modern Language Journal, 80(4), 478–493. [Summary: Study of context vs. translation in vocabulary learning — finds that context-based vocabulary learning is more effective for higher-proficiency learners; supports sentence card approach for intermediate+ learners while noting translation may be more efficient for beginners.]
• Nation, I. S. P. (2001). Learning Vocabulary in Another Language. Cambridge University Press. [Summary: The most comprehensive research review on vocabulary acquisition — covers incidental learning from context, which is the theoretical basis for sentence card review; Nation’s work is the academic foundation for context-based vocabulary practice.]
• Mondria, J. A., & Wit-de Boer, M. (1991). The effects of contextual richness on the guessability and the retention of words in a foreign language. Applied Linguistics, 12(3), 249–267. [Summary: Study of context richness and vocabulary retention — richer sentence context improves guessability and retention; directly supports the sentence card advantage over decontextualized word cards.]