Gate represents letting people in and out just like cell membrane lets materials in and out.

Students represent filling up the school just like the cytoplasm fills the cells.

Principal represents controlling everything in the school just like a nucleus controls everything in a cell.

Walls represent giving shape to a school just like a cytoskeleton gives shape to a cell.

Cafeteria represents making the food just like how the smooth ER makes lipids and vesicles for a cell.

Food carts represent transporting food to students just like the rough ER transports proteins in a cell.

Kitchen represents the food making process just like how ribosomes have a process to make proteins.

Counselor's office represents modifying and sorting things out for a student just likes how a Golgi apparatus modifies and sorts proteins in a cell.

School runner/messenger represents transporting notes to teachers just like how vesicles transport materials within a cell.

Electricity source/light bulbs represents producing electricity/ light for the school just like how a mitochondria produces energy for a cell.

School cabinets represents holding papers, books, and supplies just like how a vacuole holds storage for a cell.

School bathroom represents getting rid of waste just like how a lysosome breaks down cellular waste in a cell.

Security guard represents giving school protection just like how a cell wall gives protection and support to the cell.

Solar panels represents converts sun energy into usable energy just like how a chloroplast converts sun energy into sugar in a plant cell.