What are the disadvantages?
One major disadvantage of a seven period day is that students have seven classes to prepare for, seven textbooks to carry, and possibly seven homework assignments. On some days, students will have multiple tests to study for, thus requiring the student to perform a balancing act in order to manage his/her schedule effectively. On the other hand, students learn time management skills from balancing their schedules.
With seven classes come seven teachers who all have different classroom environments, different classroom expectations, and different classroom rules. Students must remember in whose class they can chew gum, in whose class they are only allowed to breathe, and in whose class they are allowed to roam campus.