Think:
Every second you live on this earth, time goes by. "Tick tock, Tick tock"
Think every second you waste on this earth, will give you a interminable life of working 9-5.
God gave you this life to make full use of it.
NOW THINK
Every second you use wisely and get good grades life will become better.
Think when you get that university offer to Oxford or wherever you want to go.
Think when you get that amazing job earning 100k a year.
Think when you beat everyone you know at grades.
Think when you leave you quiet town, to leave for University, to be a new person, to be a successful person, to be a completed person.
I hope I've actuated you.