As usual, loved it.
I liked how Marta is being suspended, but the real bully is sent to self-esteem classes.

Exactly how does a poor self-esteem make one into a bully? (I tend to take the little bully in my family down a notch, but that's another story. Why is it that with only two students in my kid's class, they still have to figure out a pecking order?)
I also loved the last scene. I could just picture the two boys talking with their mouths full. And I could envision Marta having visions of glory.
Nicely done.
Elisabeth