That's an extra class slot available at the parent's election. I took zero hour classes for civics and communication state requirements in the winter of my juni

That's an extra class slot available at the parent's election. I took zero hour classes for civics and communication state requirements in the winter of my junior and senior years so I could take AP Physics and AP Chemistry, which were year-long classes that exceeded the science requirements and got me some college credit. In winter, it didn't interfere with sports, and you were going to be up 2 hours before the sun anyways, so why not 3? And no, there's no bussing for zero hour. You have to drive yourself to school, ride with a parent, or find a carpool setup for either of those.