Wondering why I didn't leave a comment last time I read this story. It's excellent. Of course not very probable regarding the school using garbage duty this way as a general punishment, but if this is accepted, the story flows well and describes the emotions excellently.
From part one to part two there's a nice devellopment and I'm sure you could devellop the main character even further without ruining the general story. In fact I hope you will as i do appreciate your way of writing.