Montessori International School was founded in 1982 in Gilbert, originally opening as a primary school out on McQueen Road and Baseline. The school was extended the next year to the Gilbert Road address in Mesa where the office and two primary classes are currently housed. In 1984 MIS expanded further to include the Brown Road campus, where one primary and the elementary classes are now located.
The school currently occupies the two campuses located on Gilbert Road and Brown Road, and a toddler community next to the Brown Road campus (opened in 2003). Montessori International School has grown from its first primary class to an infant community (ages 4 to 12 months), a toddler community (ages 12 months to 2 1/2 years), three primary (ages 2 1/2 to 6 years) classes, one lower elementary class, and one upper elementary class. Hundreds of children have grown and developed through MIS’s programs, and many now contribute as adults in the community.
The MIS teaching staff is led by Therese Kestner, B.A., M.Ed, AMI certified and specializing in learning disabilities. She has taught and directed Montessori schools for the past 40 years. We are delighted to bring these facilities to life each day with the personalities of our staff, our students, and the many others that combine to make up the Montessori International School community.