"I know all about Colon P."
Marty Howard is a teacher at Ridgeway High School. He is seen to be a grouchy old man that appears to hate children.
He made his first appearance in the episode iGot Detention as the detention room monitor. According to Sam, who is sent to detention frequently, he likes to watch the Geometry Channel in the teachers' lounge. He despises Principal Franklin, and called him "weak" and "spineless" behind his back in the same episode. Though married, he seems to be having an affair with Ms. Briggs; Sam has mentioned that Mr. Howard and Ms. Briggs have made out in the teachers' lounge.
In iHave My Principals, Mr. Howard and Ms. Briggs became co-principals after Principal Franklin was fired. It was stated in this episode that Mr. Howard's wife thinks he is a loser.
Mr. Howard seems to hate the iCarly trio, especially Freddie. He constantly taunts Freddie in iHave My Principals and even says that nobody cares what he thinks in iTwins.
He appeared again in the TV special iParty with Victorious. In this episode, he wore glasses and looked a bit older. He also seems to have changed his ways of being nasty and is now presumably a responsible teacher, such as asking Carly and Sam to read their text messages out as punishment.
In two episodes where he plays a big role, his wife is mentioned. It's revealed that he has a bad marriage since he and his wife hate each other.
In iGot Detention, Mr. Howard said that he hates laughter. Sam replied, "I thought you hated your wife!". Mr. Howard answered, "Her too!"In iHave My Principals, when Mr. Howard was just about to get demoted as co-principal of Ridgeway High School, he pleaded to Superintendent Gorman, "Please! My wife finally thinks I'm not a loser!", to which Gorman clarifies, "Well, you are!"