Procrastination is bad...
Everyone knows that and I had a very good experience with the side effects of procrastinating.
Allow me to paint a scenario...
You've used to get 75-79 for History when you never bothered much with it.
You got 90+ for History after Mr. Tan Shu Hwa tells you to study it properly.
You got 85-91 for History in Form4 when you still continued to study it properly...
*Drum rolls*
You decided to slack a little...
You get a 68 for History for the first entire time in your life.
The first 75 and below for any subject in your entire secondary school life and primary school life. (apart from the first time you failed maths in primary school when you decided to talk too much and forgot to finish the test.)
Lesson learnt: NEVER PROCRASTINATE.