Golgi bodies - janitor or anyone who packages and removes items from the school.
mitochondria - generator (provides power).
ribosomes - cafeteria lady who makes "mystery meat" (makes protein)
vacuoles - could be closets (storage)
endoplasmic reticulum - an assembly line for making hamburgers (rough ER) possibly a hallway although this is somewhat of a stretch. Maybe an air tube system to carry messages etc...
lysosomes - (digestion and cell suicide) self destruct for the school in case someone invades; not sure what you would need to break down possibly an incinerator or shredder. Or it could be the closet where dangerous chemicals are stored.
cell walls - outer wall of the school.
chloroplasts - (photosynthesis) if your school was solar powered they could be the solar panels.
I am not sure what you're asking, but it sounds like you've received the assignment of creating an analogy comparing the parts of a cell to a school. This is a pretty common assignment in life science.
An analogy is just a comparison, so look at what each part of the cell does. For example, the mitochondria is the powerhouse of the cell. What part of your school provides power? Make that the mitochondria in your analogy.
Look at the parts of a school -- classrooms, closets, the principal, buses, the walls, etc.
The key here is that you show your teacher that you know what the parts of the cell do. Look those up and make sure you know them. If you compare the Golgi apparatus to the school janitor, make sure in your analogy you show how those two are alike.
Thanks! I think this will really help my 4th graders connect with the cell part functions.