Montessori Education is over a century old. Since its inception, Montessori schools have been opened worldwide. While most are pre-schools serving three- to six-year-old children, many people are not aware that Montessori spoke and wrote about middle level education before her death in 1952. Her concept for the Erdkinder, an intentionally designed learning environment for the adolescent ages 12 to 15, is described in this essay.