I agree, one hour per day is a good schedule. M-Th could be the main lessons, with reviews on Friday. I also think the scheduling should take teachers’ availability further into account, so that a wider choice is offered during the teachers’ preferred hours.
I’ve had an idea that any “empty classes” (where there’s a teacher available but no students yet) should be more flexible, so that the first student to sign up can choose which lesson will be taught, and then other students can join. I think this will improve the scheduling opportunities for everyone, at least in the situation that I’m seeing where most classes are empty but I often find it difficult to schedule specific lessons in the prescribed order. Thanks!