間隔重複 × SM-2 演算法
根據 Wozniak (1987) 的 SM-2 演算法，在你即將遺忘的時間點自動安排複習。記得越熟的字，間隔越長；常忘的字，更頻繁出現。
遺忘曲線背單字Spaced Repetition Vocab
根據艾賓浩斯記憶曲線，在最佳時間點複習英文單字。免費、不需註冊。Learn English vocabulary with the Ebbinghaus forgetting curve. Free, no sign-up.
什麼是遺忘曲線？
1885 年，德國心理學家赫爾曼・艾賓浩斯（Hermann Ebbinghaus）透過實驗發現：新學的知識如果不複習，記憶會以指數速度衰退。但只要在正確的時間點複習，每一次遺忘曲線都會變得更平緩，記憶也更牢固。
What is the Forgetting Curve?
In 1885, psychologist Hermann Ebbinghaus discovered that newly learned information decays exponentially without review. But reviewing at the right moment flattens each forgetting curve, making memories last longer.
不複習No review
有複習With review
※ 曲線為示意圖，基於 Ebbinghaus 實驗數據簡化呈現，實際遺忘速度因人而異※ Simplified illustration based on Ebbinghaus data. Actual forgetting rates vary.
56%
1小時後遺忘forgotten after 1h
66%
1天後遺忘forgotten after 1d
75%
1週後遺忘forgotten after 1wk
這個工具怎麼幫你記住單字？
結合三種經過學術研究驗證的學習方法，讓你用最少時間達到最好的記憶效果。
主動回想：Testing Effect
Roediger & Butler (2011) 證實：主動回想比被動重讀更能強化記憶。翻牌自評的機制正是 testing effect 的應用。
情境記憶：用例句學單字
每個單字都搭配真實語境的例句，讓你理解用法而非死背。搭配中文翻譯與常用搭配詞，由淺入深自然吸收。
CEFR 分級：循序漸進
單字按照歐洲語言共同參考架構分為 A1 到 B2 四個等級，從完全初學到流利表達，適合所有程度的學習者。
參考文獻
- Ebbinghaus, H. (1885). Über das Gedächtnis — 遺忘曲線理論基礎
- Wozniak, P. (1987). SM-2 Algorithm — 間隔重複演算法
- Leitner, S. (1972). So lernt man lernen — 分級卡片學習系統
- Roediger, H. & Butler, A. (2011). Testing Effect — 主動回想強化記憶
How does this tool help you memorize?
Three research-backed learning methods combined for maximum retention with minimum effort.
Spaced Repetition × SM-2
Based on Wozniak's (1987) SM-2 algorithm, reviews are scheduled right before you forget. Well-known words get longer intervals; forgotten words appear more often.
Active Recall: Testing Effect
Roediger & Butler (2011) showed that active recall strengthens memory far more than passive re-reading. The flip-and-rate mechanism applies this principle.
Contextual Learning
Every word comes with a real-context example sentence, collocations, and a bilingual definition — so you understand usage, not just translation.
CEFR-Leveled Progression
Words are organized by CEFR level (A1–B2), from absolute beginner to upper-intermediate, so you can learn at your own pace.
References
- Ebbinghaus, H. (1885). Über das Gedächtnis — Forgetting curve theory
- Wozniak, P. (1987). SM-2 Algorithm — Spaced repetition algorithm
- Leitner, S. (1972). So lernt man lernen — Graded flashcard system
- Roediger, H. & Butler, A. (2011). Testing Effect — Active recall strengthens memory
Quick guide
Use cases, answers, and nearby tools
Compact below-tool notes that help first-run users and repeated visitors move faster without changing the main interface.
How to use
Run a clean first pass
- Select your English level (A1-B2). The system arranges suitable words for you.
- See the English word, try to recall the meaning, then flip to check the answer.
- Rate your recall (forgot / thought about it / instant). The system calculates the optimal next review time.
Examples
Real jobs this page helps with
- 5-Minute Daily ReviewReview due words at scientifically optimal intervals during commute or break time. 2-3x more effective than cramming.
- CEFR-Leveled LearningFrom A1 basics to B2 advanced vocabulary, progressing through the Common European Framework levels.
FAQ
What people usually want to know
What is the forgetting curve?
The forgetting curve, proposed by Ebbinghaus in 1885, shows that memory decays exponentially without review. Timed reviews make memory more durable.
Is spaced repetition effective?
Research confirms spaced repetition extends memory retention 2-3x. This tool uses the SM-2 algorithm to calculate optimal review intervals.
Is my progress saved?
Yes. Progress is automatically saved in your browser's localStorage. No registration or login required.