an editorial is an opinionated piece written by an editor. what that really means is that you dont have to follow the traditional who, what, where, when, and how script that you would for a normal article.
editorials are written in first person, because its your opinion, and dont necessarily have to be entirely factually based. you dont need to cite sources and things like that. thats not saying that you can just BS the whole thing, but i think you know what im saying.
so what this means to you about your assignment is that you can pick anything about bullies that you want to, and just go with it. it ought to apply to current events (within your school or the world at large) and should be based on logic and fact, but youre not confined.
it could be anything, from the fact that you dont see bullies anymore, you see bullies all of the time, bullies arent respected like they used to be, bullies are respected like they used to be, etc.