The walls around the school are like the cell membrane because the walls protect and keep all of the kids and teachers at the school safe. Just like what the cell membrane does for the organelles.
The electrical box at a school is like the mitochondria because the electrical box gives energy and electricity through out the entire school. Just like what the mitochondria does for the cell.
The principal in a school is just like the nucleus because the principal runs the whole school and tells everybody what to do. Just like what the nucleus does in the cell.
The cooks in a school are just like the chloroplasts of a cell because the cooks produce food for the school. Just like what the chloroplast does for the cell.