Classes meet every other week. In between, students have a nine-day writing schedule. They are supervised by a parent, who is called the Editor.
I stumbled into the two week schedule. After I agreed to teach my first paid classes for a co-op, I learned that they only met every two weeks. I was skeptical that such a schedule would work. I soon changed my mind, because the extra week between classes produces great results.
Not counting weekends, weekly students have only four non-class days each week to write. This adds up to eight days per two weeks. In contrast, the 2-week schedule allows nine days to write. The assignment sheet breaks the work into nine daily "to-do" lists. The extra day makes a huge difference in the pace of the work.
Once people experience the less frantic pace of biweekly classes, they come to appreciate it as much as I do!