Character Analysis
A vice principal at Cesar Chavez High School with an axe to grind, Mr. Benson's mostly important because he fights with Marcus. (Like so many power-hungry authority figures in Little Brother do.)
We get Mr. Benson's personal stats right up front, showing us that Marcus knows more about Benson than Benson knows about Marcus (1.12). He's essentially The Man…and not in a good way—he's fervently pro-establishment, pro-power, and anti-Marcus. When Mr. Benson suspends Marcus it allows Marcus to wander around city, showing that Mr. Benson's power doesn't work how he thinks it does.
If these weren't reasons enough to dislike him, Mr. Benson also gets rid of Ms. Galvez (boo) and brings in Mrs. Andersen as her replacement (double boo).