Key Principles to Consider:

1. School Types: Montessori schools come in various forms, including private, public, non-profit, childcare, independent and coop or community schools.
2. Fee Structure: Some Montessori schools charge fees, while others are part of public school programs and are free, or may be subsidized.
3. Affiliation and Training: Inquire about the school’s affiliation with Montessori organizations (like AMI or the American Montessori Society, the AMS) and teacher training qualifications.
4. Classroom Observation: Reputable schools encourage observing the classroom in action.
5. Environment: Look for orderly, bright, and beautiful classrooms with Montessori-specific materials. Most materials are made of wood and very little, if any, plastic toys of any kind are to be found.
6. Uninterrupted Work Cycle: A 3-hour uninterrupted work cycle allows children to explore their interests independently or in small groups. The teacher or guide, as more commonly referred to in Montessori education, observes the children and assists when needed. The daily routine is not broken up into subject areas that children transition between at specified times. Each child works at their own pace and chooses their own work during the 3 hours blocks.
7. Multi-Age Classrooms: Montessori classrooms typically feature multi-age groupings to support collaborative learning and peer mentoring. Children are usually grouped in classrooms for infants to 3 years, 3-6 years, 6-12 years and 12-18 years. Yes, some lucky jurisdictions have Montessori schools through adolescence like these examples.
8. Curriculum: Montessori education encompasses various subjects, from literacy to practical life skills, without traditional tests or homework. The children are engaged in geography, biology, math, science, cultural studies and sensorial work through rich resources that encourage deeper exploration and intrinsic learning.
9. Inclusivity: Montessori education is designed to empower all children, regardless of background or ability. Dr. Montessori began her work with disadvantaged and developmentally challenged children and proved that these children, whom everyone believed could not be educated, actually thrived under her teachings.
10. Authenticity Check: Explore reputable organizations like AMI-Canada, AMI-USA, and AMS-USA  or the North American Montessori Teachers Association NAMTA for guidance on finding authentic Montessori schools in your area.