A little girl observes the geometric shapes [incastri piani] of wood. She counts the angles of the polygons: «three angles: triangle», «four angles: quadrangle», «five angles: pentagon»... And then observe the circle. She thinks a little and then: — This is it a zero-angle! [1930s] - Parlano i bambini, in "Montessori", a.I, n.3, 15 March 1931, p.20.

Category: Montessori schools