According to a survey of U.S. teachers in schools that switched to distance learning in spring 2020:
Only 69%
said that even half (51 percent or more) of their students participated in daily online learning.
Only 43%
said that 71 percent or more of students joined daily online learning.
67% of all teachers
said homework/assignment completion rates during remote learning were "somewhat" or "much" worse than during in-school learning.
Source: Voices from the (virtual) classroom: Survey of America's teachers on COVID-19-related education issues. (2020) Educators for Excellence.