Percy, Fred and George had heard about the changes lord Malfoy was making and were supporting them, because it would make their lives easier. If the classes were regulated, then it would be easier to have a better overview in their schedules. It would also make their schedule shorter. Percy had calculated that the practical classes had three teaching units in the week. This meant that transfiguration, DADA, charms, potions, herbology, alchemy, warding, spell crafting and weaving, arithmancy and ancient runes have each three teaching units in the week. To sum it up, ten double sessions, which have a duration of 90 minutes, would be spent on the practical part and ten teaching units for the theory. The other classes like history, astronomy, politics, laws, magical theory, muggle studies and arts of divination would take each two teaching units. They didn’t have to be double sessions. He knew that astronomy had a double session in the middle of the night, but the other subjects had twelve teaching units. And COMC had two teaching units, which were two double sessions. Percy summed it up that if a teaching session is 45 minutes long, then for all these classes, there would be 46 teaching units in an entire week. With that a student could attend all these classes without having to use a time turner.