Montessorianism
/ˌmɒntɪˈsɔːrɪənɪz(ə)m/rare
noun
The Montessori educational system or approach; adherence to this.
Origin
Early 20th century; earliest use found in Alexander S. Neill (1883–1973), founder of Summerhill School. From the name of Maria Montessori + -an + -ism.