Does course length affect how much progress users make?īecause each Duolingo course is customized for the language it teaches, the length of each course varies. A section of rows from the Spanish course for English speakers.
In the analysis we refer to the row the user reached by the end of the 90-day period as their “max row”. We measured progress based on the number of rows in the course that the users had completed. All Duolingo courses are composed of rows of 1-3 skills each (see Figure 1). For each course, we looked at the progress users had made in the next 90 days. At that time, Duolingo had launched a total of 44 courses, ranging from an Irish course for English speakers to a German course for Portuguese speakers (there are now 62 and counting). We collected data from new users who created a Duolingo account in the month of February of 2016. On the other hand, there are users who complete the course in a few short days, like this motivated Duolingo user who completed the Esperanto course only six days after it was launched! But is there a pattern to the amount of progress Duolingo users make based on the course they’re taking? If so, for which courses do we see users make the most progress? Can this tell us anything about our users? And what other factors contribute to the amount of progress made? About the data Some Duolingo users study a few lessons per day on their way to work, right before bed or whenever they have a free moment. Editor's note: This work was completed as part of Duolingo's summer internship program.Įverybody learns at their own pace and Duolingo learners are no exception.
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