Learning
Keeping you at the frontier of learning with adaptive lessons
Research
The Duolingo English Test: AI-driven language assessment
Company
Why I chose Duolingo: Michael Ye
Company
Duolingo’s values: a letter from our CEO
Research
Changes in Duolingo usage during the COVID-19 pandemic
Engineering
Migrating Duolingo’s Android app to 100% Kotlin
Learning
Practicing language comprehension – and resilience – with Duolingo Podcasts
Learning
Goldilocks and the CEFR levels: Which proficiency level is just right?
Product
Duolingo Stories: The journey to Android
Learning
Improving how Duolingo teaches Chinese—and other languages!
Learning
Doing our homework: Checking in on how well we're teaching
Engineering
Improving Duolingo, one experiment at a time
Learning
Who has the best words? A linguistic analysis of the Democratic debates
Research
How machine learning helps Duolingo prioritize course improvements
Learning