could you share more about the mechanics of it?

Do you have a separate "school" room? All the kids in one room, or separately? How many hours each day? How effective is your spouse in partitioning the "parent vs teacher" roles? How does your spouse manage to handle your kids in different "classes" (and thus education stages) at the same time?

I understand to Home-school in some US states, you are supposed to follow some sort of curriculum, how much flexibility do you have?