Meet the Founder

Nathasassi Warittanadejcho (AMI) (Khru Ae)

Khru Aer 2

Nathasassi Warittanadejcho (AMI)

(Khru Ae)

School History

Chiang Mai Montessori International School is situated in the heart of the community in which the Founder, Nathasassi Warittanadejcho (Khru Ae), was born and raised.


Khru Ae loved working with children from an early age and always knew she wanted to be a kindergarten teacher. After graduating from university with a teaching major, she worked at various kindergartens around Chiang Mai, but none offered what she was looking for.


During a visit to Chiang Rai, Ae discovered Montessori education and was totally amazed by what she saw: children from diverse backgrounds working independently and with genuine enjoyment! The focus and concentration of the children and the calm, harmonious atmosphere in the classroom were completely different to anything she had seen before. This, for Ae, was what Montessori teachers refer to as ‘the epiphany moment’: for many teachers and parents (or anyone who works with children), seeing an alternative approach to education for the first time is often a life changing experience.


Ms. Ae studied Montessori at the world renowned AMI teacher training college in London, England. Building commenced on the school you see today in 2010 and opened the same year. Chiang Mai Montessori School has been built and financed by Ae and her family.