How to Pass the Duolingo English Test Speaking Section (The Planning Method)

Archana had taken the DET before. Her vocabulary was solid, her grammar was fine, and she understood every word on the test. But the moment the timer started on a speaking prompt, she froze.

Not because she had nothing to say. Because she was trying to think and speak at the same time.

We worked with her the morning before her real test. In forty minutes, her filler words dropped from fifteen per response to three. The structure was there. The fluency followed. That's what this post is about.

Why Most DET Speaking Advice Misses the Point

Most guides tell you to practice more, learn more vocabulary, and record yourself. That advice isn't wrong — it's just incomplete. It treats a planning problem like a language problem.

Here's what we see consistently: students who struggle with DET speaking aren't struggling because their English is poor. They're struggling because they start talking before they have anything to say. The brain is generating content and producing speech simultaneously. Research on cognitive load in second language speaking confirms this — high cognitive load impairs vocabulary retrieval and hinders speech production, and the effect is worst under timed, high-stakes conditions.

The result is the pattern you probably recognize: a strong opening sentence, then a slow drift into repetition, filler words, and unfinished ideas. The problem isn't fluency. It's that there was never a plan.

The 4-Word Outline

Every DET speaking task gives you a preparation window before you record. Most students use this time to panic. We teach students to use it for one thing only: building a four-word mental outline.

Not sentences. Not a script. Four anchor words, each representing one idea you're going to develop.

The prompt: Describe a restaurant you enjoy and explain why it's your favorite.

A student without a plan might say: "I like Korean food, it's very delicious, I go sometimes, the food is good and I enjoy it with friends." Forty seconds of content that says almost nothing.

A student with four anchor words — Paris / Korean / tabokki / Friday — has a structure before they open their mouth. When they speak, each word becomes a developed idea:

• Paris → "There's a restaurant near the Champs-Élysées, on a street called Saint-Liber..."
• Korean → "It serves Korean food — a cuisine I'd never tried before moving to that neighborhood..."
• tabokki → "My favorite dish is tabokki — it's a baked rice cake with spicy sauce, similar in texture to a dumpling..."
• Friday → "We go on the last Friday of every month, a group of friends who also love the food..."

Same student. Completely different output. The English didn't improve. The planning did.

Big to Small: How to Fill Time Without Rambling

Once you have your four anchor words, you need a way to expand each one without losing the thread. We call this Big to Small.

Every time you introduce something — a place, a person, a thing — you start at the largest reference point and work down to the most specific detail.

Paris → neighborhood → street → restaurant name.

A movie → the main character → one specific scene → why that scene matters to you.

This gives you a reliable sentence pattern to follow under pressure. It also gives the evaluator enough context to understand what you're talking about — which directly affects your coherence score. The AI scoring model doesn't know your city, your street, or your favorite dish. You have to build the picture. If you assume shared context, your ideas will seem underdeveloped even when you're saying something interesting.

This is the same reason DET Interactive Speaking trips so many students up — the task feels conversational, so they skip the planning step entirely. They pay for it in coherence.

The One Mistake That Kills Fluency

There's a specific mistake students make even after they've built a good outline: they pick a topic they can't describe well in English.

One student we worked with wanted to talk about the Avengers for a film question. Her English was fine. But she kept stopping — she didn't have the vocabulary for specific plot points, character powers, or action sequences. Every pause was a fluency penalty.

We switched to Titanic. She could describe the boat, the class divide, the love story. Simple vocabulary, clear narrative. Her response on the same question type was noticeably stronger.

The DET doesn't reward impressive topics. It rewards developed ideas. If you have two choices — something interesting you can't describe well, or something simple you can talk about fluently — always pick the second. This is one of the core reasons DET scores stall between 90 and 100 — students are choosing topics that feel right but speak poorly.

What a Strong Response Actually Looks Like

Both of these responses are from students at a similar English level. Prompt: Describe a memorable experience.

Without a plan: "I have many memorable experiences. One time I went to a museum and it was very interesting. I saw many paintings and historical things. It was with my family and we enjoyed it very much."

With four anchor words (Louvre / cousin / pyramid / Mona Lisa): "Five years ago, my cousin visited from London and wanted to see Paris. We went to the Louvre — one of the most famous museums in the world, known for its glass pyramid entrance. The section that affected me most was the Mona Lisa gallery. Not because of the painting itself — but because of the crowd around it, which made me think about how art becomes famous for reasons that have nothing to do with the art."

Same vocabulary level. The second scores higher on content, coherence, and development because it was planned before it was spoken. For a deeper look at how to build your story bank before test day, see our post on 5 stories that cover almost any DET speaking prompt.

How to Practice This

The fastest way to build this skill is not to practice speaking. It's to practice planning.

Find a DET speaking prompt. Set a 20-second timer. Write four anchor words. Then speak for 90 seconds using only those four words as your structure. Evaluate one thing only: did each anchor word turn into at least two specific sentences?

If you have more time, write your responses first and send them to ChatGPT with this prompt: "I'm practicing for DET speaking. Did I develop each idea enough? Where did I stay too general?" It will show you exactly where you're summarizing instead of explaining — and that's the same gap the research on cognitive load and oral production identifies as the core breakdown point under timed conditions.

The Day Before Your Test

Don't practice vocabulary. Practice outlining. Take ten prompts, write four anchor words for each one, speak for 90 seconds per prompt. Focus only on development — does each anchor word turn into at least two specific sentences?

That single habit, practiced consistently, is what separates students who pass from students who plateau.

If you want to see exactly where your planning breaks down across all DET task types, our diagnostic session maps it and builds a preparation plan around it. You can book one here.