According to the convention, a class in school is basically 40~50 minutes (mostly 45 minutes). In social institutions (generally training institutions), each class lasts for one to two hours.
Extended data:
Class introduction related to class hours:
The unit of measurement of education and training time related to "class hours" is "class hours". Class hours refer to the learning time calculated by class hours. It is generally believed that both non-adult education and full-time university education are 40-minute classes. Therefore, if 30 class hours of training tasks are needed, the effective training time is 30×40= 1200 minutes, 1200/60=20 hours.
In addition, we usually don't arrange a break of 10 minutes between classes. So the teaching time in the morning is 8:00~ 12:00***5 classes:
The first period is from 8 to 8: 40.
Section 2: 8: 50 ~ 9: 30
Section 3 9: 40 ~ 10: 20
Section 410: 30 ~11:10
Section 511:20 ~12: 00
References:
Class hours-Baidu Encyclopedia