Because the school admitted students at irregular times and in irregular numbers.
Naturally, there was no such thing as a school term or vacation, much less a rule that one graduated after a certain number of years.
Once someone arrived at the school, they would undergo endless "learning." Only by earning the principal's attention could they possibly receive an opportunity to graduate.
Therefore,
A class often welcomed new students, while some students suddenly departed... Most of those who remained had already spent decades or even centuries in the class.
The class assigned to Han Dong and the other four top students was naturally the Rocket Class, with the strongest teaching staff.
Its teachers had all once been top students themselves and were qualified to become incarnations of Mr. Teacher. Unfortunately, their compatibility was unsuitable, so they chose to remain at the school and teach, cultivating even more outstanding candidates for incarnation.
The corresponding courses were also fundamentally different from those at ordinary schools.
There was no language arts, mathematics, physics, history, or anything of the sort.
There were four subjects here:
1. Psychology was the most important subject, and it was taught by the homeroom teacher.
2. Comprehensive Natural Sciences covered every body of knowledge in science and engineering. Various theoretical experiments were even conducted in class. These scientific foundations were compiled from the sciences of Different Worlds.
3. Comprehensive Literature was a comprehensive literary system centered on multilingual studies and archaeology.
It likewise drew material from diverse worlds. If an individual achieved one of the school's highest rankings in this subject, they might be assigned clerical work at the Academic Affairs Office.
4. Physical education mainly consisted of various competitive events. Related competitions were held in the gymnasium at regular intervals, and dying during a contest was quite common.