Each year Class Central publishes a ranking of The Top Free Online Courses of All Time, based on thousands of reviews written by learners. We first published the ranking in 2016, and have updated it every year since. In 2019, we increased the number of courses in the list from 50 to 100, drawing on more than 60,000 learner reviews.
https://www.classcentral.com/collection/top-free-online-courses
