The school resembles an upright ship submerged halfway into the ground. There is a double door entrance with two windows on each side of the building. There is a sign that says "Bikini Bottom School" above the doors, and a window above the sign. There is a bell tower on top of the building and an anchor attached to the building. There is a playground outside with a swing set and a jungle gym.
Inside, there is tile flooring, and a bookcase filled with books near the corner of the room. Above it, there is a poster tacked onto the wall that has the letter "A" on it above a picture of an apple. There is also a chalkboard on the other wall, a music stand, and a floor tom-tom located in the room.
Role in series
When Mr. Krabs tells SpongeBob why he likes summer, the Bikini Bottom School is shown. A school bells rings and multiple children run out of it.
"Lost and Found"
When Squidward finds a kazoo, he remembers when he had one as a child. In the memory, it shows a young Squidward inside the Bikini Bottom School. He plays the kazoo off-key, causing the other people inside to run out, screaming.