School session is a CLASS='font-bold underline-link hover:text-barberry-yellow'>TERM used to refer to the period of time in which students attend classes. It can refer to a CLASS='font-bold underline-link hover:text-barberry-yellow'>SEMESTER, which is typically a 15-week period of instruction, or a CLASS='font-bold underline-link hover:text-barberry-yellow'>SEMINAR, which is a short course focused on a specific topic. A CLASS is a single meeting of a course, usually lasting an hour or two. All of these terms are used to describe the period of time in which students attend school.