The Problem With How Most People Learn Vocabulary
You study a word list on Sunday night. By Wednesday, half of it is gone. By the following week, you've forgotten almost everything. Sound familiar? This isn't a memory problem — it's a method problem.
Most learners rely on massed practice: reviewing words repeatedly in a single session and then moving on. But research in cognitive science consistently shows that spaced repetition — reviewing information at gradually increasing intervals — leads to far better long-term retention.
What Is Spaced Repetition?
Spaced repetition is a learning technique where you review material just before you're about to forget it. The idea is based on the forgetting curve, a well-documented phenomenon showing that memory decays predictably over time — and that each review resets and extends that curve.
In practical terms, this means:
- A new word gets reviewed after 1 day, then 3 days, then 1 week, then 2 weeks, and so on.
- Words you find easy are shown less frequently.
- Words you struggle with are shown more often.
The result is a system that spends your study time where it matters most.
The Best Tools for Spaced Repetition
You don't need to manage this manually. Several apps automate the scheduling for you:
- Anki — The gold standard. Fully customizable, free on desktop, and supported by a massive library of community-made decks. It has a steeper learning curve but rewards the investment.
- Duolingo (with caveats) — Uses spaced repetition principles but pairs it with gamification. Good for motivation; less efficient for serious vocabulary building.
- Clozemaster — Excellent for intermediate learners. Teaches vocabulary in context using fill-in-the-blank sentences drawn from real texts.
- Memrise — User-friendly with pre-made courses and native speaker video clips.
How to Build Your Own Vocabulary Deck
Pre-made decks are convenient, but building your own is more effective. Here's why: when you create a flashcard, you engage with the word more deeply. You look up examples, choose a personal sentence, and make a decision about what matters — all of which strengthens encoding.
- Source words from your input. Add words you encounter while reading, watching, or listening in your target language. These are words you'll encounter again naturally.
- Include context, not just translations. Add the original sentence where you found the word. Context aids recall and shows real usage.
- Add one image or sound cue where possible. Dual-coding (linking a word to a visual) dramatically improves retention.
- Keep daily reviews manageable. Aim for 10–20 new words per day maximum. Adding too many creates a review backlog that becomes overwhelming.
The Intermediate Learner's Vocabulary Target
At the intermediate level (roughly B1–B2 on the CEFR scale), your vocabulary goal should be moving from the 2,000–3,000 most common words toward the 5,000–8,000 word range. This is the threshold where reading authentic texts becomes genuinely accessible and conversations stop feeling like a mental obstacle course.
You don't need to learn words randomly. Prioritize:
- High-frequency vocabulary — The most common words in your target language.
- Domain vocabulary — Words related to topics you actually talk about (travel, food, work, hobbies).
- Collocations — Word combinations that native speakers use naturally (e.g., "make a decision," not "do a decision").
The Daily Habit That Makes It Work
Spaced repetition only works if you show up consistently. Even 10–15 minutes of daily review beats a two-hour session once a week. Pair your review sessions with an existing habit — morning coffee, a commute, or lunch — and protect that time slot.
After 90 days of consistent use, most learners notice a significant shift: new words stop disappearing, and recall starts feeling effortless. That's the compound effect of spaced repetition working exactly as designed.