In these difficult times, we’ve made a number of our coronavirus articles free for all readers. To get all of HBR’s content delivered to your inbox, sign up for the Daily Alert newsletter.

The staggering impact of Covid-19 on education systems around the world is unlike anything we have seen in the post-war era. More than 1.6 billion students have been affected, representing over 91% of all students in the world. Unsurprisingly, demand for online learning has skyrocketed. In the last 30 days, there were 10.3 million enrollments in courses on Coursera, up 644% from the same period last year.