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.

Friends

 * Muffy Crosswire: She invited him to her spring party.
 * 3rd Grade Male Cat: Seen walking out of the movie theater together in The Agent of Change.

Appearances
Specials
 * Specials
 * Arthur - It's Only Rock 'n' Roll
 * 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 8
 * Bitzi's Break-up 801b
 * Vomitrocious 805a
 * Season 9
 * Francine's Big Top Trouble 902a
 * George Blows His Top 902b
 * The Law of the Jungle Gym 903b
 * Binky Goes Nuts 910a
 * Season 10
 * Desert Island Dish 1003a
 * Do You Speak George? 1009a
 * What's Cooking? 1010a
 * Season 11
 * Germophobia 1101b
 * Phony Fern 1104a
 * Francine's Pilfered Paper 1108a
 * Buster Gets Real 1108b
 * Season 12
 * The Cherry Tree
 * Season 13
 * The Great MacGrady 1301
 * The Silent Treatment 130201
 * Season 14
 * The Agent of Change 140201
 * Season 15
 * Buster's Secret Admirer 150301
 * To Eat or Not to Eat 150501
 * Season 16
 * Brain's Biggest Blunder
 * Season 20
 * Cereal 2002b
 * The hallway minatoar
 * Arthur and the Haunted Treehouse

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.