The Sunbury Middle School is one of the points of interest in Once Human, and it is full of dangerous Deviants guarding high loot crates containing precious weaponry and armor for you.
Just like any other point of interest in Once Human, it is filled with hidden chests that you need to find to complete the exploration of the location. The Sunbury Middle School is located in the southwest direction of Meyer’s Market, which is unlocked after you reach level 15 following the game’s tutorial quests.