I am a homeroom teacher in a primary school (private school, not in the US). Homeroom teachers at my school have 4 hours a day with our students. In the lower grades, we teach "core subjects" (math, reading, writing, science and social studies) in three of those four hours, and the other hour is social-emotional team building and language activities (speaking/listening and some phonics). In the upper grades each teacher is in charge of teaching one subject for the whole grade level, so I teach math for three hours and then I have the social-emotional/language hour with my homeroom class.

The other hours of the day are what some schools call "related arts" or "special area" classes -- music, art, PE, etc. Our students also have a 30-minute lunch break and 70 minutes of recess time over the course of the day.

We follow US curriculum for the core academic subjects.

I absolutely believe that students can get through "what a kid learns in 7 hours of public school" in 3 hours of homeschool. School is designed to fill most of a work day so parents can work a full day, not because we have that much academic content to cover.

But I also know kids can miss out on some really important academic rigor (especially in math and science), socialization, and/or exposure to arts if their parents aren't well-informed in their approach to homeschool.