The Good Curriculum is designed for students who are self-disciplined and self-motivated. Students whose minds wander, are unlikely to do well with this curriculum.
The typical class assignment requires an hour: a half hour of reading — or writing every fifth lesson — and a half hour of watching a lecture and taking notes. If a student takes five courses, that is five hours a day of hard work.
There is no question that lots of students will rebel against this regimen and refuse to invest the effort, but parents will have to lead and persuade them to do the work. The end result will be well worth it.