Middle School (also known as Junior High) is a place where pookies go after they graduate from Elementary/Primary School. As soon as they start Middle School, they become middles. In about a year or so, they will become much older middles. After the middle graduates Middle School, they will become biggies in High School.
- Most Fam fam members first go to Pre-School, then Stool, then Middle School, then High School, and finally, College/University, unless if they are homeschooled.
- It is mostly held in the University, unlike Stool and Pre-School, which are usually held in the Bookroom.
- Middle School is sometimes held at the mumu/duh duh's or another penguin's igloo.
- Middle School almost never has school uniforms.
- Some middles just skip straight to High School, although this is not very common.