Burr Settles is the Head of Research & AI at Duolingo, the world’s largest language-learning platform with the mission of making education free and accessible to all. In his role, Burr spearheads the AI strategy for Duolingo’s learning app and the Duolingo English Test. He is the author of Active Learning, the standard text on adaptive machine learning algorithms. His research has been published in Cognitive Science as well as major AI venues such as NuerIPS, ICML, and AAAI, and has been covered by The New York Times, Slate, Forbes, WIRED, and BBC. Previously, Burr was a postdoc at Carnegie Mellon and earned a PhD from UW-Madison.