The importance of maintaining a register"Roll number 21", "Present Sir". "Oh! You are present today". "What were you doing for the last three days"? "Sir, I was seriously ill, couldn't even get out of my bed". "Ok, so where is the letter"? "I require the letter signed by your guardian". "Sir, I will bring it tomorrow". "Ok, sit down but do not forget it tomorrow". This is a familiar situation of our school days. If the student was seriously ill he can easily produce the letter stating the reason for absence with a signature of the guardian the next day. Now, anybody can imagine what is going to happen the next day in the very first period/class if the reason for absence was completely different. This is the importance of maintaining an attendance register. You have the previous record of activities of the student in front of you.
It is also useful for certain people. Now if you forget the way of doing certain things, you can keep a register with you containing the ways you followed to do that task on previous occasions. Another important use is for those who are habitual liars. If you do not maintain a register of excuses you have provided for a particular thing on yesterday as well as the day before yesterday, you can be in trouble today.