Can anyone help me correct this little story?

I was once a playful boy,a typical B.T.O.(big time operator), squandered too much time on playing video games.When I was graduated from primary school,I have had to take an entrance examination before I could go to junior school.Of course I failed in the exam.News came like a bolt from the out of the blue.I only have two choices:go to the worst school at my hometown or drop out. I wanted to drop out at that time, then my mother, a very wise woman, came to me and talked said,"It's been done, and for better or worse, we can not change it now, but I'd like you to go to the worst school rather than drop out. You know, even in the worst school, we could can still make a difference and do make some changes.