There has been a raging battle over the past three decades around the kind of schedule that best benefits students. This has, generally speaking, taken two sides. On one side are those who have hewn to a “traditional” schedule of seven 40-minute periods a day, with every class meeting every day for the entire year.1 On the other side are those who have embraced what is known as the “block” schedule. This has many variations. In its pure form, it is structured as four 90-minute periods a day with each class meeting daily for a semester. The classes then change and the format is repeated.2 The following table delineates the major technical differences between these two types of schedule.