10. Arithmancy
Minerva had been stressing herself out over the schedule of a third year girl of her house for the past week as she continued to add, then drop, then add again different classes to take on this term. After a long day of paperwork and waiting at the Ministry of Magic and some very confusing corridors in the Department of Mysteries, she was ready to meet with Hermione Granger to solve this predicament.

“Miss Granger since you have decided not to drop Arithmancy from your desired schedule, you will need to use this.” She handed her the golden time-turner.

“Wisely.”