I would argue it helped older, more mature people who have greater self-discipline. Not only that but they are quite self motivated. They are great - for those

I would argue it helped older, more mature people who have greater self-discipline. Not only that but they are quite self motivated. They are great - for those people. If you want to teach every child (which is what we do) then the classroom is by far a better model. Teachers do this every day. They set online tutorials and quizzes for homework.