An article written by C. Hodges, S. Moore, B. Lockee, T. Trust and Aaron Bond provides an indepth analysis of the difference between well-planned online learning and emergency remote teaching, which instructors, tutors, teachers and professors worldwide are forced to offer their students in the Covid situation. 

Providing a clear distinction between the highly variable design solutions in the field of this type of learning/teaching -  distance learning, distributed learning, blended learning, online learning, mobile learning, and others the authors successfully compare well-planned effective online learning and emergency remote teaching, which is defined as  ''a temporary shift of instructional delivery to an alternate delivery mode due to crisis circumstances''.