The Montessori method is educational philosophy as well as methodology. Originally was developed in the early 1900s by Dr. Maria Montessori as a way to educate the lower-income children. Many Montessori bases schools are elementary school or preschool in level, but there are some Montessori programs which begin with infants and/or end at 12th Grade.The Montessori philosophy is built upon the idea that children should develop and think differently than adults. Dr. Montessori believed in children's rights, children working to develop themselves into adults, and that this development would lead to world peace.