We finally have this year's monitor badge. I still have mine from last year. It sounds like an easy job but it's not as easy as you think it is. You have to make sure the kids listen to you, you have to make sure no one's doing anything you wouldn't want them to do and if something does go horribly wrong it would come back to us and it'll be our fault.
I think it's a huge responsibility to look after the class especially if the teacher isn't in the classroom with you. Everyone has a chance to become a good monitor. I am proud to say that I am a 2017 monitor!