Monthly exams' first day.
A not-so-important day for students who don't study. A barely passing grade was already good for them. However, not wanting to look stupid, they would try to study for a bit and get a higher score.
Let's face it, students who say they don't study are just making excuses so that once they get low scores, they will not look stupid to others.
Fortunately, the school allows them to bring notes even on exam days. They can look at it and study when they are outside their respective rooms. As obvious as it is, they cannot bring their notes once they are inside their rooms.
Enduring the outside without an air conditioner, a lot of students formed groups. They are having a group study.
Those who are inside their classroom, enjoying the cold and silence, were either truly smart or truly lazy.