Harmony Montessori School A joyful learning experience for your child Harmony Montessori School is a small school in east Portland with an eclectic program firmly based on the principles and methods of Maria Montessori. At the present time, we serve approximately 50 children ages 2 1/2 through 6. We offer an unusually flexible schedule: 4 and 5 day enrollment options, extended-day care, and ...