Learn the test before you chase a score
How the DET works
Understand the one-hour flow, computer-adaptive delivery, task sequence, and the Writing and Speaking Samples.
All 13 task families
See the current frequency, timing, response mode, and direct practice link for every parent task family.
10–160 score guide
Learn how overall, individual, and integrated subscores are reported and how different response types are evaluated.
Room and equipment setup
Prepare the supported computer, second camera, accepted ID, speakers, room, desk, software, and network.
Rolling seven-day plan
Turn your test date, focus subscores, and completed PrepEx attempts into one available next action at a time.
PrepEx practice tests
Run a complete PrepEx mock when you understand the task families and can protect an uninterrupted practice window.
Move from information into the right attempt
| Goal | Best resource | Use it when |
|---|---|---|
| Learn the current structure | DET format guide | You are new to the test or returning after a format change. |
| Understand one task | DET task library | You need its timing, response mode, and practice link before trying it. |
| Target one skill | DET Practice Hub | You know which Reading, Listening, Writing, or Speaking family needs work. |
| Run a full session | PrepEx practice tests | You want a complete practice experience and a saved PrepEx report. |
| Plan the next week | DET Study Plan | You have a test date and want a focused sequence based on your evidence. |
| Review saved evidence | DET Dashboard | You want task coverage, recent results, and practice recommendations. |
| Prepare the real room | DET setup guide | You need to verify equipment, phone-camera placement, ID, and rules. |
Four facts to anchor your preparation
You need a supported desktop or laptop with a front-facing camera, microphone, and speakers, plus a charged phone camera that records your head, shoulders, screen, and keyboard. You also need a physical accepted ID and a private, well-lit room.
Use PrepEx to learn and practise; use Duolingo for official decisions
PrepEx creates independent practice content, feedback, and practice estimates. It does not reproduce Duolingo's operational item bank, adaptive selector, proctoring, or scoring model. Check the current official pages again before your test because rules and technical requirements can change.
- Official DET Test Structure
- Official item-scoring overview
- Official test policies, rules, and requirements
- Official device and operating-system requirements
- Official phone-camera setup
Official pages rechecked September 1, 2026. Duolingo's live Help Center remains the authority for current candidate rules.