Achieving 100% completion in Bully: Scholarship Edition requires dedication and attention to detail. Here's a comprehensive checklist:

Main Story:
- Complete all 5 Chapters.
Classes:
- Complete all 5 levels of every class (English, Chemistry, Art, Gym, Shop, Photography, Music, Biology, Geography).
Missions & Errands:
- Complete all Main Missions.
- Complete all Side Missions (marked with a yellow star).
- Complete all 50 Errands (marked with a blue 'X').
Collectibles:
- Collect all 75 Rubber Bands.
- Collect all 40 G&G Cards.
- Collect all 6 Transistors.
- Destroy all 25 Gnomes.
- Destroy all 27 Pumpkins (Halloween only).
- Destroy all 19 Tombstones (Halloween only).
Mini-Games & Activities:
- Win all Bike Races.
- Win all Go-Kart Races.
- Complete all levels of Lawn Mowing.
- Complete all levels of Paper Route.
- Win all Boxing Matches.
- Win all Dodgeball Matches.
- Complete all Carnival Games (High Striker, Shooting Gallery, Whack-a-Greaser).
- Complete all Arcade Games (high scores not required, just play them).
- Complete all Detention mini-games (e.g., 'Keep the Peace').
Other:
- Purchase all clothing items from the 'Worn In' store.
- Purchase all items from the Souvenir Shop.
- Purchase all bike upgrades from the Bike Shop.
- Kiss all 6 girls.
- Take all yearbook photos.
Keep track of your progress in the stats menu. Some items or activities are only available during specific chapters or times of day, so plan accordingly.