Time for a big cleanup.
Most of those who don't need to participate in the cleanup choose to move their desks and chairs outside before leaving.
Class Four is at the edge of the floor, near the open corridor, which is rather convenient because desks and chairs can be directly moved to the corridor without piling them up in the classroom.
If piled up in the classroom, we'd have to clean one side first, then move stuff to the other side, and clean the other side.
Actually, moving stuff like this isn't tiring and is even easier than moving to the corridor, but the annoying part is that during moving or even just by vibration, textbooks and other miscellaneous items risk falling out of the drawers.
During cleanup, we definitely have to mop, and if books get wet, it's pretty annoying because stains are unacceptable.
But on the open corridor, there's no such risk.
