The 100LS Method: A Complete Guide
Published on June 19, 2026
What is the 100LS Method?
100LS stands for "100 Listening and Speaking." The idea is simple: choose a short piece of native audio — a movie scene, a podcast clip, or a dialogue — and listen to it one hundred times while actively speaking along.
The method was popularized in Korea and has since spread globally because it produces noticeable results without requiring expensive classes or textbooks.
Why Does It Work?
- Massive exposure: By the hundredth repetition, your brain has absorbed intonation, rhythm, vocabulary, and grammar patterns.
- Contextual memory: Words are learned in real sentences, not isolated flashcards, making recall faster and more emotional.
- Motor training: Speaking along trains your mouth muscles to produce unfamiliar sounds accurately.
- Confidence: Knowing a scene by heart gives you ready-made language chunks you can use in real conversations.
How Chunk Box Helps
Doing 100LS manually is tedious. Chunk Box automates the hard parts: it splits audio into replayable chunks, lets you loop any sentence, records your shadowing, and tracks how many times you have practiced each segment.
Instead of fighting the player, you focus entirely on listening and speaking.
Getting Started
- Pick a one- to three-minute clip you enjoy.
- Listen once without reading the transcript.
- Use Chunk Box to break it into chunks.
- Shadow each chunk until you can say it smoothly.
- Repeat the whole clip daily for several weeks.
Consistency beats intensity. A few focused minutes every day will outperform occasional long sessions.