Many high schools, junior high schools, and middle schools across the country have zero period classes that meet before the start of the regular school day. Zero period typically begins around an hour before first period, often at 7:00am, but sometimes as early as 6:30 am. I even read about a class in a Seattle area high school beginning at 6:10 am. Classes offered during zero period usually fall into three categories: 1. Elective extracurricular classes (e.g. music: art); 2. Advanced academic subjects (e.g. IB History; Physics); 3. Remedial classes. Zero period classes are often oversubscribed as they are sometimes the only period that some classes are offered.