Read THIS blog post by a teacher. I mean actually read it. Take it in. Think about it. And then, write about it. What do you think about it? What is the teacher trying to say? In your own words explain what "the main event" is.

I think that the teacher is trying to say that you should do good in school and work hard now so you will be better off when you graduate. The main event is not getting good grades but learning to work hard.