According to the convention, basically a school class lasts 40-50 minutes (mostly 45 minutes). In social institutions (generally training institutions), each class lasts for one to two hours. Class hours are the time unit of continuous teaching, that is, 1 class hours are the time occupied by a class.
The World Health Organization stipulates that a class lasts for 45 minutes, which is determined according to the degree of eye fatigue and the duration of cerebral cortex. The most effective memory duration of human cerebral cortex is 45 minutes. After this time, memory will decline and eyes will be tired. Take a break every 45 minutes 10 minutes, and you can relax for 10 minutes, do outdoor activities, go to the toilet and look at objects 5 meters away.
The average length of a class in a university:
The length and number of class hours are related to the majors chosen by students. It varies from person to person, and the specific situation is analyzed. Professional courses are less every day 1 big class (2 bars and 2 hours), and professional courses are taught all day, and sundays are generally more relaxed.
But the overall schedule of colleges and universities is similar. Generally, it is a big class, including two small classes, one small class is 45 minutes, there is a 10-minute break between the two small classes, and there is a 20-minute break between the two big classes. Generally, classes begin at around 8: 00 in the morning, at noon 1 1: 20 (or 1 1:50).