The college entrance examination is full-time, and an educational institution was born. It is said that there is no dead angle camera in the class to watch students study?
As a tutor, to be honest, most of these things are gimmicks, or for students with weak autonomous learning ability. It doesn't matter to children who can already learn. These resources are all set up for your own study. Therefore, it is most important to learn by yourself, and don't rely too much on these external facilities. Start (a disease)