There certainly were objections to Montessori and, as we see today, fierce arguments among the many thought leaders who dedicated their lives to transforming education. But I disagree that “progressive intellectuals” “adamantly and vociferously rejected Montessori for pedagogical reasons.” Education often becomes bogged down in idealogical warfare because we become distracted by differences instead of uniting on common ground. I think there is a lot of common ground, both historically and today. Building on that will advance both Montessori pedagogy and the transformation of education.

If you have not read “Founding Mothers and Others”, I highly recommend it. Many progressive schools were founded by women who studied with Montessori, sought to spread her pedagogy and gave her great respect and credit. Helen Salz and Flora Arnstein,founders of San Francisco’s Presidio Hill School, were inspired to launch their school after observing Montessori work with children in a glass walked classroom at the 1915 San Francisco Exposition. Other Californians attended her California lectures, studied her work, traveled to Italy or trained in her US programs. They went on to found schools and train teachers. This didn’t stop in 1916, indeed most of these schools were founded between 1918 and 194o. They still exist and acknowledge their Montessori roots.

Margaret Naumberg, who trained extensively with Montessori, simultaneously launched a public Montessori and a private one in New York. The schools had very different results but I don’t know why the public program was not replicated or sustained. I wonder what lessons we could learn from the difference in the public implementation and the private one which grew into The Children’s School, later the Walden School, which lasted for over 50 years.

Helen Parkhurst was purportedly the only person Maria Montessori authorized to train teachers. She is known as the “mother of the Dalton School” and the architect of the Dalton Plan which was extremely influential in inspiring school design not just in the US but internationally. Dalton remains a leading school in both popularity with families, credibility with college admissions offices, and with the education community.
It would be interesting to learn how you think it is aligned with Montessorian pedagogy and how it differs.

The bigger question is what are the essential elements of a Montessori education and how are they adapted across different contexts? Should Montessori classrooms only have Montessori materials? For example, can they incorporate Caroline Pratt’s unit blocks? Can’t we teach educators to observe play with unit blocks & facilitate intellectual development through applying Montessori methods with these excellent non-Montessori materials?

Montessori principles are widely taught in education philosophy, early childhood, and child development courses. The basic principles are familiar but not the practices. Is that because the education establishment has shut them out or because the AMI & AMS have not made training accessible? That is probably a hot button question for a highly visible and rapidly growing start up but, IMO, the success of Higher Ground & the Bezos “Montessori inspired” schools will hinge on three things, accessibility, adaptability, and accountability. Indeed any form of transformation will have to tackle those three areas and that is one reason finding common ground is important.

Your work is interesting and important. Good luck!