Nowadays, in order to increase students' enthusiasm for class and prevent students from skipping classes, many universities will use QR codes to conduct roll call. This is simply miserable for students because there are no good countermeasures. People don't know when roll call will be called, so they don't dare to skip class. For schools and teachers, it is better to increase class attendance.

Firstly, the roll call using QR code is a random roll call. Students do not know when the roll call will be held, so they do not dare to skip class. Compared with the traditional roll call method, this method is more flexible, and the teacher can operate it at will. There is no need to roll call before class. It can be done during class or at any time, which can improve students' attendance rate.

The second is that the way of naming is uncertain. Many people think that for roll call, you only need to randomly scan the code, but for the QR code, you can add verification conditions. Even if a classmate helps you, personal verification will be required later, so you will not be able to skip class.

The third way is to make class more interesting. Using the QR code to directly call the roll call, compared to the previous traditional method, students are more interested in knowing who will be so unlucky, so everyone will come to class in an interested way. In this way, it can increase the interest of learning among classmates and help adjust the learning atmosphere.

There are so many benefits for universities to use QR codes for roll call. It is not so much a change in tricks as it is a change in modern education methods. Because society is progressing now, the mobile phones used by people are becoming more and more convenient, and the education methods also need to be reformed and changed. Otherwise, students who cannot keep up with the teaching of science and technology may find it boring.