Now Enrolling at Keystone

Why We Give

2023 Fall Festival


AZ Tax Credit

The Keystone Blog

Keystone Calendar

Latest News

Keystone Coffee Talk 2023

August 11, 2023

Keystone Coffee Talk, a popular parent education event that supports community con...

On August 1, 2023, Keystone students will begin to return to campus for the 28th year. ...

The 2023 Sustaining Fund kicks off this week at Keystone with Spirit Week! Keystone fam...

Watch Me!

Upcoming Events

Updates From Ms. Laura & Mr. Stefan


Dear Keystone Families,

On August 31st, Montessori educators, students, and families celebrate the 153rd anniversary of Dr. Maria Montessori’s birth. Dr. Montessori was a pioneer, a visionary, and laid the foundation for a shift in education and the way the world views children. In particular, she believed children create a path to peace for all mankind. Each day, we strive to live up to the ideals she outlined for us. It is up to each of us to keep her spirit alive and remember why we commit ourselves to her method of education. Whether the role we play in life of a child is that of parent, teacher, mentor, or friend, she has entrusted us to carry on her legacy. By choosing a Montessori education for your children, you have joined together with people across the globe who believe as Dr. Montessori did, “Within the child, lies the fate of the future”.

Dr. Maria Montessori’s vision is the “keystone” which helps to guide our path each day. The strength of our community combined with our commitment to Montessori helps us to fulfill our school’s mission to inspire in children a passion for a lifelong love of learning in an environment which nurtures independence, creativity, confidence, and tolerance while developing a sense of responsibility for self and community. 

In honor of Dr. Montessori’s birthday, please take a moment to read some interesting facts about our founder, and always remember, “Peace is what every human being is craving for, and it can be brought about by humanity through the child” ~ Dr. Maria Montessori 

Did you know???

  • Maria Montessori was the first woman to receive a medical degree in Italy. 
  • Helen Keller was a good friend of Dr. Montessori and helped to develop many of her sensorial materials. 
  • Dr. Maria Montessori made her first trip to the United States in 1912. 
  • In 1915, a Montessori class was set up at the San Francisco World’s Fair, and she won two gold medals for education. 
  • Dr. Maria Montessori left Italy during World War II. She moved to India where she and Gandhi often discussed the role of children and their education in promoting world peace. 
  • Anne Frank was a student in a Montessori school before she and her family went into hiding. 
  • Alexander Graham Bell started a Montessori school for his grandchildren. 


In Health and Peace,

Laura Hertzler                            Stefan Linder
Head of School                          Associate Head of School





Community Sponsors


Per A.R.S. § 38-431.02. Notice of meetings for the Board of Directors of Keystone Montessori Charter School and any of its committees will be posted on this website under Explore Keystone – School Board – Meeting and Agendas. Notices will also be posted on the Lobby Bulletin Board, 1025 E. Liberty Lane, Phoenix, Arizona 85048, which is open to the public between 7:30 a.m. and 5:30 p.m. Monday through Friday.


This site provides information using PDF, visit this link to download the Adobe Acrobat Reader DC software.

Facebook Tracking Pixel