Injustice in the School

Do you know when you are in the school and they always are injustices and yo say that it's unfair and they don't listen you.
This is what it's happend in my school. .We do hockey and when somebody lost,on person starts:
Ears of dunce we going to put because ........... don't know how to lose
(in spanish it rimes)
But then if another person it's saying, the teacher scolds him.
IT'S UNFAIR