Ricardo Bánffy - Lessons Learned after 190 Million Lessons Served [EuroPython 2016] [20 July 2016] [Bilbao, Euskadi, Spain] (https://ep2016.europython.eu//conference/talks/lessons-learned-after-190-million-lessons-served) What we learned along the way - processes, organization, technology and people - from 0 to 11 million students, 40 thousand courses and 20 thousand teachers.