Why do schools prefer to build class groups with nails?

(One nail sends information, which is more conducive to the class teacher to understand the reading situation of parents.

In the past, the class teacher sent a message on WeChat, and parents needed to reply one by one to know whether they had read the message.

After reading the nails, the parents will take them out and see that the class teacher knows well and doesn't have to ask again, which greatly improves the efficiency.

(2) Because the nail registration requires the mobile phone number of the parents, it is much more convenient for the class teacher to find the phone number of the parents, which also greatly improves the efficiency.

(3) In the WeChat group, some parents often send some junk messages that have nothing to do with study, which seriously affects everyone's mood, and the class teacher is not good at criticizing directly because of face. But it's impossible not to criticize, because the group is mainly responsible for the WeChat group. If the group often sends some illegal information, the group owner will bear legal responsibility.

(4) Many parents report that the information on WeChat is difficult to download and easy to expire. I think this may be one of the reasons for changing nails!