Public schools employ eachers that teach at more-or-less the speed of the slowest student, where the time of the teacher is divided n-ways. If a student can lea

Public schools employ eachers that teach at more-or-less the speed of the slowest student, where the time of the teacher is divided n-ways. If a student can learn more quickly than that of the slowest student in the public school or with anything-but-the-least-divided-attention, then the home-schooling adult would not need to be 'full-time'.