On the contrary, Montessori's work has been validated and reinforced by research and scientific insights in recent decades. [1]

If you truly seek to understand the Montessori teaching method and materials, you should look into her writings, including the teacher's guides. She experimented and developed these materials and methods over decades. Her purpose was to teach children mastery of their mind and hands, our two unique tools of survival.

[1] "Montessori: The Science behind the Genius" http://www.montessori-science.org/montessori_science_genius....