Before Day 1: The Diagnostic Test (Non-Negotiable)
Every effective DET study plan starts with a diagnostic test — not a study session. Take Duolingo's free official practice test at englishtest.duolingo.com/practice before you open a textbook. Your results show your estimated score range and weakest subscore. This tells you which question types to prioritise for the next 30 days.
| Your Lowest Subscore | Root Cause | Where to Focus in Your Plan |
|---|---|---|
| Production | Weak writing and/or speaking output | Days 8–20: Interactive Writing, Write About Photo, Speaking tasks daily |
| Literacy | Vocabulary gaps, reading accuracy | Days 1–15: Read and Select, Read and Complete drills + vocabulary builder daily |
| Comprehension | Listening accuracy, reading speed | Days 5–20: Listen and Type, Interactive Listening, reading speed drills |
| Conversation | Spoken fluency and responsiveness | Days 10–28: Interactive Speaking, Speak About Photo, speaking sample practice daily |
You can also take a free mock test on app.prepingo.io to get estimated subscores alongside your practice score — this gives you more granular feedback on which specific question types are dragging your score down.
The 30-Day DET Study Plan: 4 Phases, 45 Minutes Per Day
Phase 1: Format Mastery (Days 1–7)
Goal: Understand every question type before you practice a single one. Knowing the instructions, time limits, and scoring contribution in advance means you never waste seconds reading during the real test.
| Day | Focus | Daily Task (45 min) | Practice on Prepingo |
|---|---|---|---|
| Day 1 | Test format + diagnostic | Take official DET free practice test. Record your estimated score and subscores. | Take a Prepingo mock to get subscore breakdown |
| Day 2 | Reading question types | Learn: Read and Select, Read and Complete, Fill in Blanks. Practice 15 questions each. | Read and Select + Read and Complete drills |
| Day 3 | Listening question types | Learn: Listen and Type, Listen and Complete, Interactive Listening. Practice 10 each. | Listen and Type drills (beginner difficulty) |
| Day 4 | Writing question types | Learn: Write About Photo, Interactive Writing Part 1 + 2, Writing Sample. Write one of each timed. | Write About Photo (AI feedback on) |
| Day 5 | Speaking question types | Learn: Interactive Speaking, Speak About Photo, Speaking Sample. Record yourself for each once. | Interactive Speaking practice (6 questions) |
| Day 6 | Proctoring setup | Read the full DET proctoring rules. Set up your test space: secondary camera position, desk clear, lighting check, mic level test. Run the DET system check. | Complete Prepingo proctoring compliance checklist |
| Day 7 | Week 1 mock test | Take a full timed mock test. Compare results to Day 1 diagnostic. Identify your single weakest question type. | Full Prepingo mock test with subscore report |
Phase 2: Skill Building (Days 8–18)
Goal: Targeted daily drills on your weakest subscore question types. This is the phase where most score improvement happens. Minimum 30 practice questions per day, with AI feedback review.
| Day | Focus | Daily Task (45 min) |
|---|---|---|
| Day 8 | Production: Write About Photo | Write 5 photo descriptions (1 min each). Review AI feedback. Rewrite the lowest-scoring one. |
| Day 9 | Literacy: Vocabulary | Study 20 C1 word upgrades from the cheat sheet. Write 10 sentences using them. Add 5 to your flashcard deck. |
| Day 10 | Comprehension: Listen and Type | Complete 20 Listen and Type questions. For every wrong answer, listen again and identify exactly which word you missed. |
| Day 11 | Production: Interactive Writing | Write 3 full Interactive Writing responses (5+3 min each) using the O.R.E.O structure. Submit for AI scoring. |
| Day 12 | Literacy: Read and Complete | Complete 25 Read and Complete questions. For every blank you struggled with, identify the word's part of speech and root pattern. |
| Day 13 | Conversation: Interactive Speaking | Practice 12 Interactive Speaking prompts using P.P.F. structure. Record and listen back — check for silence gaps and filler words. |
| Day 14 | Week 2 mock test | Full timed mock test. Compare subscores to Day 7. Measure improvement in your target subscore. |
| Day 15 | Production: Writing Sample | Write 2 Writing Samples (5 min each). Count your word totals. Aim for 120+ words each. Swap any repeated vocabulary. |
| Day 16 | Comprehension: Interactive Listening | Complete 2 full Interactive Listening sections. Practice taking brief notes during the conversation. |
| Day 17 | Literacy: Read and Select | Complete 3 full Read and Select sets (50 words each). Mark words you weren't 100% certain about — look them up. |
| Day 18 | Production: Speaking Sample | Record 2 full Speaking Samples (3 min each). Listen back. Check: Did you fill all 3 minutes? Did you maintain eye contact with camera? Was pace natural? |
Phase 3: Simulation & Refinement (Days 19–26)
Goal: Shift from skill building to test simulation. Practice under real conditions — timed, webcam on, secondary camera set up, phone on Do Not Disturb. Each mock test should feel identical to the real exam.
| Day | Focus | Daily Task (45 min) |
|---|---|---|
| Day 19 | Mixed drills | 10 Read and Select + 10 Listen and Type + 2 Write About Photo. Speed focus — no pausing. |
| Day 20 | Speaking under pressure | 6 Interactive Speaking + 1 Speaking Sample — webcam on, door locked, zero re-records. Simulate real conditions. |
| Day 21 | Full mock test #3 | Full Prepingo mock test under full proctoring simulation. Secondary camera on. No interruptions. |
| Day 22 | Error analysis | Review every wrong answer from Day 21 mock. Group errors by question type. Identify your remaining weak point. |
| Day 23 | Targeted repair | 30 focused questions on your Day 22 identified weak question type. Quality over quantity. |
| Day 24 | Writing marathon | Write 3 Interactive Writing responses + 1 Writing Sample back-to-back. Build stamina for sustained written output. |
| Day 25 | Vocabulary review | Review your flashcard deck. Practice using your 25 word upgrades in spoken sentences out loud. Add 5 new ones. |
| Day 26 | Full mock test #4 | Full mock under real conditions. Target: within 5 points of your goal score. If not, identify the gap. |
Phase 4: Test-Day Readiness (Days 27–30)
Goal: No new learning. Consolidate, rest, and prepare your environment. Cramming in week 4 increases anxiety without improving scores.
| Day | Task |
|---|---|
| Day 27 | Light review only — 20 minutes max. Review the cheat sheet once. Review your transition word list. |
| Day 28 | Room setup rehearsal. Set up secondary camera, run DET system check, test mic volume, clear desk. Confirm your ID is valid. |
| Day 29 | Rest day. No studying. Sleep 8 hours. You are ready. |
| Day 30 | Test day. Start your exam in the morning when mental alertness is highest. Eat before starting. Keep water off-camera. |
Score-Adjusted Study Plans: What to Change Based on Your Starting Level
Starting Below 100 (Targeting 105–115)
Add 2 more weeks before starting Phase 2. Spend the extra time on: daily English reading (10 minutes of news articles), listening to short English podcasts (15 minutes daily), and building your vocabulary base to 500+ words before practicing timed responses. Do not rush to mock tests — your foundation needs to be stronger first.
Starting at 110–120 (Targeting 125–130)
This is the most common profile. Follow the full 30-day plan as written. Your biggest lever is Production — spend an extra 15 minutes on writing and speaking tasks every day in Phase 2. Focus heavily on vocabulary diversity: any word repeated in a response is a missed scoring opportunity.
Starting at 120+ (Targeting 130–140)
You already have strong fundamentals. Compress Phase 1 to 3 days (you know the format), extend Phase 3 to 12 days, and focus entirely on: (1) eliminating vocabulary repetition, (2) extending responses to their full time limit on every question, and (3) achieving perfect proctoring compliance — one invalidation at this level costs you weeks.
5 Daily Habits That Accelerate Your Score (Takes 10 Extra Minutes)
- Read one English news article every morning. BBC, The Guardian, or The Economist. This builds the academic reading vocabulary that feeds directly into Read and Complete and Interactive Reading.
- Add 5 vocabulary words to a flashcard deck daily. Anki (free) with spaced repetition means you review words at the moment you're about to forget them — far more efficient than re-reading lists.
- Speak English for 5 minutes before bed. Talk about your day in English, describe what you see around you, or respond to a random question. Speaking fluency is built by frequency, not duration.
- Time yourself on every practice question. The DET is fast. Practicing without a timer creates false confidence. Every Prepingo drill has optional timers — use them from Day 3 onward.
- Review AI feedback immediately after each writing/speaking response. Don't queue up 5 questions then read all feedback at once. Immediate correction after each response creates stronger retention.
Frequently Asked Questions: Duolingo English Test Study Plan
How long should I study for the Duolingo English Test?
Most students need 2–4 weeks of consistent daily practice. If your English is already strong (IELTS equivalent 6.5+) and you're aiming for 120+, 2 weeks of focused practice is usually sufficient. If you're starting from a lower base or targeting 130+, 4 weeks gives you enough time to build all four subscore areas properly.
How many hours a day should I study for the DET?
45 minutes of focused, active practice per day is more effective than 3-hour sessions on weekends. The DET tests adaptive performance — your brain needs consistent daily exposure to build the response speed the test demands. Short daily sessions beat long infrequent sessions every time.
What should I study first for the Duolingo English Test?
Start with a diagnostic test, then focus on your lowest subscore. If Production is low, prioritize writing and speaking practice. If Literacy is low, focus on vocabulary building and Read and Complete drills. Don't study everything equally — the test is adaptive and your score is determined by your strongest consistent performance areas.
Is 1 week enough to prepare for the Duolingo English Test?
If your English is already at C1 level and you just need test format familiarity, yes — 7 days of focused preparation covering all question types and a mock test can be enough to score 115+. If you're building from B2 level or aiming for 130+, 1 week is not enough. Use the 30-day plan.
What is the best free resource to prepare for the DET?
The official Duolingo practice test at englishtest.duolingo.com/practice is the best starting point — it gives you a real score estimate in the actual test interface. For question-type-specific practice with AI feedback, app.prepingo.io gives you free practice questions across all 13 question types with instant scoring.
How do I improve my DET score in 30 days?
Follow the four-phase plan above: diagnostic first, then format mastery (days 1–7), skill building targeting your lowest subscore (days 8–18), full simulation under real conditions (days 19–26), and test-day preparation (days 27–30). The single highest-leverage action is daily writing and speaking practice with AI feedback — Production is where most score gains happen.