A corollary of the last one is teacher availability. Although good teachers are always difficult to hire, it is more difficult to get an instructor for a conventional classroom unless you have funds available to pay an experienced teacher. My observation is that many people who are very opposed to this system have never used it, and they do not understand how it works. Some of the following comments are more relevant to high school students than to those of lower grades. The majority of high school students that I polled who have learned by this process, like this system.
Children have a greater flexibility in scheduling their work which in turn teaches responsibility.
This is especially true of a student who goes on a trip with his parents or a high school student who wants to graduate early. This can be negative, but if controlled, it does give the children an opportunity to be with family more often. The opportunity to take electives is greatly increased because the student can do consumer math, for example, even if no one else does. This is of particular advantage for a self-motivated student. Teachers can more easily handle a greater variety of grades and classes since the lesson planning is done and much of the make-work type of functions is performed by the students.