Mighty Mountain School

Mighty Mountain School is a public elementary school located in Elwood City and according to Elwood City Turns 100!, one of the 15 schools in Elwood City. They are the main rivals of Lakewood Elementary School. In April 9th, Arthur and his friends from Lakewood were transferred to this school while Lakewood was under repairs from being damaged by fire, but eventually transferred back to Lakewood when it was restored. Binky and some of his friends that are part of the Tough Customers, used to go to this school before transferring to Lakewood Elementary at some point.

Athletics
Mighty Mountain competes in the following sports, often against Lakewood: They also have a cheerleading squad which comes to certain sporting events, including soccer and track.
 * Bowling
 * Baseball
 * Their baseball team not only competes at the school level but plays the Little League circuit, as seen in "Baseball Blues".
 * Soccer
 * Softball
 * Track and Field

Activities
Mighty Mountain is known mainly for athletics. However, they do have a group of chess-lovers spearheaded by Los Dedos. They have a good soccer team with they manly compete with Lakewoods team.

Students

 * 3rd Grade Female Aardvark (Number 5)
 * 3rd Grade Female Aardvark (Number 7)
 * 3rd Grade Female Aardvark (Number 11)
 * 3rd Grade Female Aardvark (Number 12)
 * Mighty Mountain Player
 * 3rd Grade Female Bear (Number 3)
 * Cheerleader bear
 * 3rd Grade Female Cat (Number 4)
 * 3rd Grade Female Rabbit (Number 3)
 * 3rd Grade Male Aardvark
 * Mighty Mountain Bowler No. 8
 * 3rd Grade Male Bear
 * 3rd Grade Male Dog (Number 5)
 * 3rd Grade Male Rabbit (Number 3)
 * 3rd Grade Male Rat (Number 2)
 * Marina Datillo
 * Sam Scarborough
 * Toby
 * Los Dedos
 * Danny Torres
 * Portia Demwiddy
 * Slink (former student)
 * Biff Biffington (former student)