Search this site
Skip to main content
Skip to navigation
Sideups
Home
Zoom-In
Zoom-Out
Level-Up
Contact
Sideups
Home
Zoom-In
Zoom-Out
Level-Up
Contact
More
Home
Zoom-In
Zoom-Out
Level-Up
Contact
Duolingo and co-founder Luis Von Ahn.
Videos
The first-year of Duolingo.
Massive-scale online collaboration
Duolingo Closed Beta Video
Luis von Ahn
Podcasts
How I Built This with Guy Raz: reCAPTCHA and Duolingo: Luis von Ahn on Apple Podcasts
Google Sites
Report abuse
Google Sites
Report abuse