The Issue Of Block Scheduling In Schools Lately there seems to be talk about adapting a block schedule to Unit 5 High Schools. A typical block schedule is where students take two classes in the morning and two in the afternoon. These four class periods are all 90-minutes each. This way year long courses are cut to a semester and semester course to a marking period. Proponents of this schedule state many advantages to plan. Better grades, students learn more, more teacher- student interaction, more time for teacher planning, and less stress are a few of them. Though supporters for the block schedule say that it