2025-09-10 AMI Montessori 6-12 Diploma Course 2025 AMI Montessori 6-12 Diploma Course 2025 September 10, 2025 - February 19, 2027 AMI Montessori 6-12 Diploma Course 2025 This is an intensive full time programme designed to help students study closely the theory and practice of the Montessori approach to educating 6-12 year old children in the classroom.