Located in East Marietta since 1974, the Casa Montessori School serves a student body of preschoolers through the 6th grade, with four primary classes (half-days) and three elementary-level classes. Older students should have a Montessori background or show an ability to thrive in a Montessori classroom. Florence Johnson, the founding director who opened Casa, formerly was a volunteer in her son's Montessori school.