Just how long depends on the length of the course, Bittner says, but it isn't uncommon to see three- or four-hour classes. The quarter system is another type of academic calendar in higher education.

A single quarter comprises 20 minutes of actual game time. However, 'time-on' is added for any stoppages, including injuries and throw-ins. This means each quarter generally lasts for 25 to 30 ...