Mr. Marco

Mr. Marco was Arthur's 2nd Grade teacher at Lakewood Elementary School. He is an aardvark, like Arthur. He also seems to be the football coach as seen in "Arthur's Baby".

Mr. Marco is one of the 2nd Grade teachers at Lakewood, and was Arthur's teacher before he started learning under Mr. Ratburn. He is a kind teacher but doesn't tolerate any misbehavior from his students, and has zero-tolerance for cheating.

According to the episode, "Arthur and the True Francine", he once punished Francine for copying off Muffy's paper during a math test, although it was later discovered that it was Muffy who cheated by copying off of Francine, and she instead was punished.

Personality
Mr. Marco cares a lot about his students and does his best to give them a good education. However, he is very stern and will not hesitate to punish anybody who cheats in class.

The desks in his classroom are usually separate from each other in rows and facing the front of the classroom (unlike Mr. Ratburn whose classroom has groups of four desks that allowed the students' desks to face each other).

Like the Brain he is left-handed. He does have a playful side, and in "Double Dare" was revealed to be a fan of Dark Bunny.

Appearance
Mr. Marco dresses similar to Mr. Haney. He has light sky blue jacket with a yellow cream shirt underneath and a tie. He also has light sky blue pants and brown shoes. His coaching outfit is the same color but only a sweater and darker athletic pants with a white ball cap. In the early Arthur books, he was depicted as a moose with glasses, but the cartoon changed his appearance into an aardvark and removed the glasses.

Former students
Most of his students became Mr. Ratburn's students when they moved into third grade.
 * Arthur Read
 * Buster Baxter
 * Francine Frensky
 * Muffy Crosswire (since the second quarter of the school year)
 * Alan Powers
 * Sue Ellen Armstrong (shown in many episodes, but her background story was revealed in Sue Ellen Moves In during the winter of third grade)
 * Fern Walters
 * Binky Barnes (classroom goof in Arthur and the True Francine)
 * George Lundgren
 * Jenna Morgan
 * 3rd Grade Female Rabbit
 * Frankie

Trivia

 * Mr. Marco's most prominent appearances were in Season 1, but he has appeared very rarely since then.
 * In Arthur's Eyes, he has the same classroom as Mr. Ratburn, but in Arthur and the True Francine the walls were purple and there were dinosaurs painted onto them.