The document uses analogies to describe various cell organelles as parts of a school. The cell membrane is described as the walls of the school that provide security and comfort. Ribosomes are analogous to teachers who make proteins to help students learn and become leaders. Chloroplasts are like the lunch ladies who produce nutrients for students to use. The endoplasmic reticulum is compared to the principal who is the leader where learning starts. Mitochondria are likened to the school board who provide everything students need to succeed.