It's not mentioned but [cost] online courses offer: 1) Slides with custom content for example a joke of what happens if everyone decided to lower their own wag

It's not mentioned but [cost] online courses offer: 1) Slides with custom content for example a joke of what happens if everyone decided to lower their own wages. Considering that the pdf contents are dry, slides win in this aspect. 2) Community. Like-minded people discussing the course and how to solve it. 3) Peer/authority review. The teacher or a partner reviews the work done by the person. Optional) Programmable quizs. Those generate pseudo random questions (Most easy for math-like courses). Optional) As part of doing a course, have the student generate questions and answers (Best for non-math-like courses as per above). This is the student's contribution back to the foundation to continue to provide more information.