You can see the notebook at a specific time when the student wants you to see the notebook.

七彩さんによる写真ACからの写真

1. You can see the notebook at a specific time when the student wants you to see the notebook.

If you are going to go move around the classroom, the students have to wait just sitting at the seats until you'll come to.
If you make the students bring the notebooks to you, you can see the notebook at a specific time when the student wants you to see the notebook.
It OK to sitting your teacher's desk and just waiting.
It would be so important.

Because the students who finished works could economize the time that they just keep hanging on until the teacher will come to.

The principle called "KEEP BUSY". Teachers must always keep students busy in the lessons.

You should keep this principle.
However, I must say a rule that you definitely must follow.