The school is similar to an average school, with a playground, gym, classrooms, and others. The principal is a strict teacher named Albert Green. However, in Season 4, he was replaced by his step-son, the much nicer Mark Leone.
In the Season 1 comic "Locker 239", the 2nd Grade student Mark Sanders accidentally drove right into the side of the school with his mother's car. Two years later, in the Season 4 comic "The Amnesia Act of 2015", the area that was destroyed is covered with caution tape.
- Albert Green - Principal (? - 2013)
- Mark Leone Jr. - Principal (2014 - present)
- Michael Jacob - 5th/6th Grade Math Teacher (? - present)
- Charlie Richards - 5th/6th Grade Science Teacher (? - present)
- Amanda Pratt - 5th/6th Grade Language Arts Teacher (? - present)
- Leslie Stevens - 5th/6th Grade Social Studies Teacher (? - present)
- Scott Hill - Gym Teacher (some time after 2012 - present)
- Season 6 has the least amount of appearances of the school, only appearing in the season finale due to the series taking place over a summer vacation.
- "Locker 239" is the first comic to take place entirely at the school (during three days).
- "The Lockdown" is the second comic to only take place at the school.
- Sibling Rivalries Pre-Series
- Sibling Rivalries Main Series (Season 1)
- The McRearys Get Schooled! (first appearence; exterior and Mr. Jacob's classroom seen)
- Frightful Football Reunions (playground seen)
- Diamonds in the Rough (exterior and Mr. Jacob's classroom seen)
- Locker 239 (hallway, school auditorium, Mr. Jacob's classroom, and playground seen)
- San Salvador's Story (hallway seen)
- Sibling Rivalries Main Series (Season 2)
- The Football Faker (cafeteria seen)
- Love is What Makes the World Go 'Round (exterior and cafeteria seen)
- Dodgeball Mishap (gym seen)
- Sibling Rivalries Main Series (Season 3)
- Field Trip Gone Wrong! (exterior, Mr. Jacob's classroom and playground seen)
- Patrick McReary: School President (exterior, hallway, Mr. Jacob's classroom, and Mr. Leone's office seen)
- Sibling Rivalries Main Series (Season 4)
- Wouldn't It Be Nice? (updated exterior, Mr. Jacob's classroom, Mr. Richards' classroom, and hallway seen)
- The Amnesia Act of 2015 (exterior, hallway and boys' restroom seen)
- One Tough Break-Up (exterior and cafeteria seen)
- Feeling Peachy (hallway seen)
- Sibling Rivalries Main Series (Season 5)
- Trading Places (exterior, playground, Miss Lee, Mrs. Pratt, and the unnamed Math Club classrooms seen)
- A Christmas Story (exterior, hallway, and cafeteria seen)
- The Lockdown (exterior, cafeteria, hallway, boys' restroom, Mr. Leone's classroom, and various classrooms seen)
- Satellite Screw-Up (exterior and boys' restroom seen)
- ApRiL fOoLs DaY: wIsCoNsIn StYlE! (hallway and Mr. Jacob's classroom seen)
- Sibling Rivalries Main Series (Season 6)
- Wisconsin's Greatest Hero (hallway and playground seen)
Total Number of Appearances: 20