A school period is a time-frame including a set of educational activities from start to finish. In many cases it will be a full season. In others it may be as small as a single educational unit that is completed in a few days or weeks. It really can be customized according to your exact needs.
A school period includes all records pertinent to students, teachers or instructors, grades, assessments, tuition fees and other financial data, notes, classes and subjects, as structured and organized for the set time-frame.