The jobs at a Montessori school focus teaching children, managing school operations, or performing administrative duties. A Montessori teacher, who may have assistance from a teaching assistant, helps students learn and develop using the method developed by Maria Montessori. School administrators oversee school operations and communicate with parents. The responsibilities of other support staff may include providing nursing services, performing secretarial tasks, or working as a janitor. Most Montessori schools teach at the preschool or elementary school level.