Ontwikkelingsstadia volgens Montessori
https://actonacademycolumbus.com/blog/Montessori-stages-development-infancy
https://www.bbc.com/future/article/20230131-does-the-montessori-method-actually-work
https://www.timetoast.com/timelines/maria-montessori-95090f04-bae7-4067-b56c-5d4008bd76f1
Stamboom Montessori
https://www.interactum.be/web/wp-content/uploads/montessoris.pdf