More specifically, it was a system in which each class in each grade was divided into the morning class and the afternoon class, which were taught by the same teacher, respectively; since this was a unique system in Japan at the time, it drew attention.
すなわち、学年のクラスを午前と午後とに分け、一人の教師がそれぞれ授業を行う方式であり、当時全国に例を見なかったことから話題になった。