How do teachers arrange seats at school?

Arrange seats according to the height of students, and sort them from front to back according to the height of students. This ranking is mainly based on the fact that students don't block their sight before and after, which is beneficial for students to see the contents on the blackboard clearly. This is more fair and reasonable. This is a more humane traditional way. Although this method of arranging seats solves the problem of looking at the blackboard, it is difficult to give consideration to both. For example, some students are nearsighted now, so it is obviously unreasonable to insist on height. This way of arranging seats seems simple, but there are still many difficulties in actual operation, especially in poor classes, and some parents and human relations are difficult to deal with.