There are many ways to log in. The simple way is to sign with pen and paper. For example, teachers in schools ask students to sign their names and count the number of people. More often, there is an electronic sign-in method. Punching in at work is another sign-in form to prove a day's work.

Learn to sign in through the teacher. If you don't sign twice, you will get ten points deducted from your final grade after school.