Spaced Repetition Explained for Language Learners

Part of the Vocabulary Series

This article is part of our English Vocabulary Learning Hub — explore word lists, idioms, phrasal verbs, and more.

If you've ever crammed a word list and forgotten it a week later, you've met the problem spaced repetition solves. It's the most evidence-backed way to move vocabulary into long-term memory — and it costs nothing. Whether you are working through the Vocabulary Learning Hub or drilling a specific word set, spaced repetition is the technique that makes your practice sessions count.

What Is Spaced Repetition?

Instead of reviewing everything at once, you review each word just as you're about to forget it. Easy words come back rarely; tricky words come back often. Over time, the gaps grow and the word sticks.

Why It Works: The Forgetting Curve

Memory decays predictably. Each well-timed review flattens that curve, so you remember longer with less total effort. It's the opposite of cramming — little and often beats a lot, once.

How to Use It for English

Study a small set of words with Flash Cards, mark which ones were hard, and bring those back sooner. Reinforce recognition with Matching Pairs and recall with Anagram. For a fun variation that embeds words in a scanning task, try Word Search — it is an effective low-pressure review tool between intensive sessions.

Make It Stick With Context

Words learned in sentences last longer than isolated words. After flashcards, meet the word again in Complete the Sentence or Cloze Dropdown. Choosing a vocabulary set with a clear theme — such as the word lists in the Vocabulary Learning Hub — gives each spaced repetition session a focused goal and makes it easier to track progress.

A Starter Schedule

Review a new word the same day, then after 1 day, 3 days, a week, and two weeks. Don't overthink it — even rough spacing beats massed practice. Short daily sessions are the secret. On lighter review days, a Word Search using the same vocabulary set provides low-effort scanning practice that reinforces word recognition without the cognitive load of active recall.

FAQ

How many words per day? 5–10 new words, reviewed consistently, is sustainable and effective. Browse the Vocabulary Learning Hub for curated word lists to work through systematically.

Do I need special software? No — any flashcard tool plus a simple review rhythm works. Start with our free Flash Cards, then vary your practice with Word Search for low-effort review sessions.

Frequently Asked Questions

What is spaced repetition?

Spaced repetition is a learning technique that schedules reviews of information at precisely timed intervals — short intervals when material is new and hard, increasing intervals as the material becomes more familiar. By reviewing information just before you would naturally forget it, spaced repetition makes each review as effective as possible and dramatically reduces total study time.

How does spaced repetition improve vocabulary retention?

Spaced repetition targets the forgetting curve directly. Without review, vocabulary learned today is typically 70% forgotten within a week. With optimal spaced review (after 1 day, 3 days, 1 week, 2 weeks, 1 month), the same vocabulary achieves 90%+ long-term retention with a fraction of the total review time. Active recall during each review strengthens the memory trace further.

What is the Ebbinghaus forgetting curve?

Hermann Ebbinghaus (1880s) documented that memories fade exponentially over time without review — typically losing 40% within 20 minutes, 70% within a day, and 90% within a week. The forgetting curve is the same for everyone and for every type of verbal information. Spaced repetition directly counteracts this curve by scheduling each review at the optimal moment before forgetting occurs.

How does spaced repetition differ from regular studying?

Regular study typically involves mass practice — reading or reviewing material in long sessions, often immediately before a test. Spaced repetition distributes practice over time. Mass practice produces fast short-term gains but poor long-term retention. Spaced practice produces slower initial learning but far superior long-term retention — exactly what language learning requires.

Is spaced repetition suitable for all types of learners?

Yes. Spaced repetition is a general memory principle that works for all learning styles and ages. It is particularly valuable for vocabulary acquisition because vocabulary learning is inherently cumulative — each word must be stored in long-term memory and available for rapid retrieval. The discipline required (consistent daily reviews) suits motivated, self-directed learners best.

How can LexFizz be used as a spaced repetition tool?

Use Flash Cards on LexFizz for spaced repetition vocabulary practice. Create a review routine: new words today → review tomorrow → review in 3 days → review in 1 week. The Flash Cards exercise shows you a word and asks you to recall its meaning before revealing the answer — this active recall is the core mechanism of spaced repetition. Mark difficult words for more frequent practice.

How often should I review vocabulary using spaced repetition?

A practical schedule for new vocabulary: Day 1 (learn), Day 2 (first review), Day 5 (second review), Day 12 (third review), Day 30 (fourth review), then monthly. For a vocabulary list of 100 words, this requires about 15 minutes per day for the first month, reducing to 5 minutes per day for maintenance. Dedicated SRS apps like Anki automate this scheduling.

Are flashcard apps like Anki better than manual spaced repetition?

Anki and similar SRS apps automate the scheduling algorithm, removing the manual effort of tracking which words need review and when. This is a significant advantage for large vocabulary sets (500+ words). For smaller sets or learners who prefer a game-based approach, LexFizz Flash Cards with a manual schedule are highly effective and more engaging for many learners.

Can spaced repetition help with grammar learning?

Yes, although it is most naturally applied to vocabulary. Grammar patterns can be learned via spaced repetition using example sentences — see the sentence, recall the grammar rule it demonstrates, check. This works well for grammar forms that require memorisation (irregular verbs, preposition collocations, fixed phrases). For rule-based grammar, exercises with varied examples are more effective than pure SRS.

How long does it take to see results from spaced repetition?

Most learners notice improved recall of studied vocabulary within 2–3 weeks of consistent daily practice. Significant vocabulary growth (200–300 additional productive words) typically requires 2–3 months of systematic study. The key insight from research: learners who study with spaced repetition for 30 days consistently outperform those who study without it for 90 days.