Craig Hopkins

"3rd Grade Male Rat" is an unnamed third grader in Miss Sweetwater's class.

He played the flute for the school band in "Elwood City Turns 100!".

He makes regular appearances in many episodes. He appears to get along with other kids. His only line occurs while he is walking past Buster, Arthur, and Binky in the episode "Buster's Growing Grudge".

Physical appearance
3rd Grade Male Rat is a rat with an olive green complexion. He has whiskers and a little hair. He wears a blue-and-white striped pullover and brown pants with blue sneakers. His backpack is green. In the episode Germophobia he wore light blue swim trunks.

Personality
In Buster's Growing Grudge, he was shown walking up the steps mumbling, "Oh, Dear. Oh Dear." He may have been having a bad day or an overall nervous and pessimistic personality. Not much is known about him, but he appears to be nice and friendly to the other kids.

Episode Appearances
season 14
 * Season 1
 * Arthur's Eyes
 * Arthur and the Real Mr. Ratburn
 * The Scare-Your-Pants-Off Club
 * Season 2
 * Arthur and the Square Dance
 * Water and the Brain
 * Season 3
 * Revenge of the Chip 305b
 * Dad's Dessert Dilemma 307b
 * Arthur's Almost Live Not Real Music Festival 311b
 * Season 4
 * Muffy's New Best Friend
 * Season 5
 * Double Dare 501b
 * It's a No-Brainer 503a
 * The Lousy Week 505a
 * The Election 506a
 * Season 7
 * Muffy Goes Metropolitan 702b
 * Elwood City Turns 100! 705
 * Jenna's Bedtime Blues 706b
 * Season 9
 * Binky Goes Nuts
 * Season 12
 * The Cherry Tree
 * agent of change
 * Season 16
 * Brain's Biggest Blunder
 * Brain's Biggest Blunder

Trivia

 * According to "Sue Ellen Moves In", Buster thinks he is an alien.
 * In "Francine's Big Top Trouble", Arthur imagines D.W. being respected by everyone because she is his little sister. 3rd Grade Male Rat was shown cheering D.W. on in front of Lakewood Elementary School with other students.