@danielmcclure on Twitter: "Duolingo Halloween Disaster https://danielmcclure.com/blog/duolingo-halloween-disaster/ https://t.co/xhHy4w5q69"

Last Updated: October 31, 2015

Duolingo Halloween Disaster https://danielmcclure.com/blog/duolingo-halloween-disaster/ https://t.co/xhHy4w5q69

Source

https://twitter.com/danielmcclure/status/660301069382123520