The Fifth Year of Hogwarts School of Witchcraft and Wizardry is the final year before becoming an upperclassman.
During the Fifth Year, students take their Ordinary Wizarding Level tests, and prepare for their future careers, by picking which classes they will take in their Sixth Year and Seventh Year. In order to take the Nastily Exhausting Wizarding Test level classes in their Sixth and Seventh year, they must obtain an E for Exceptional or O for Outstanding on their OWL for the corresponding class.
Before the start of the Fifth Year, a boy and a girl from each House is selected to be a Prefect. These students help control the younger students, and guide them as they become acclimated to the school. They are also allowed to give out Detention for punishment.