When we first started homeschooling, we picked a classical curriculum that required five days of school work. Since I had just pulled my son out of a parochial school, I took the the five-day school model as an assumed standard. My son must do five full days of schoolwork to learn just as he had in school.
However, that plan didn’t work for long. I quickly discovered that my son was behind in math and couldn’t keep up with the schedule for the classical homeschool curriculum. Soon we were both frustrated.