I am lucky enough to know a lady who is now in her nineties and who was happy to share with me an Album of incredible photographs taken by herself and her husband while teaching young german children using the Montessori model of education. It was then in its infancy and as you can see with the fashion of the time, the haircuts and even the actual photo album with its hemp cover and cobweb design tracing paper inlays we see this is something from the early seventies. The complete absorbtion in the faces of the children over such simple toys is amazing. I include below an entry from wikipedia about montessori and i hope you take inspiration from the photographs which are of exceptional quality (the originals-not mine).
come back again if you are interested to see some more sketchbook entries.
Montessori education is fundamentally a model of human development, and an educational approach based on that model. The model has two basic principles. First, children and developing adults engage in psychological self-construction by means of interaction with their environments. Second, children, especially under the age of six, have an innate path of psychological development. Based on her observations, Montessori believed that children at liberty to choose and act freely within an environment prepared according to her model would act spontaneously for optimal development.