The Sensorial area is one that often confuses those who have not been immersed in the Montessori Method. Sensorial exercises were designed by Maria Montessori to help young children explore every quality that can be perceived by the senses—size, shape, composition, texture, loudness or softness, matching, weight, temperature, diameter, etc. The purpose and aim of Sensorial work is for the child to acquire the knowledge and language to allow her to describe her environment.
In the photos above, children can be seen sorting knobbed and knobbless cylinders by height and diameter. They are sorting tablets that range from rough to smooth. The broad stair, which has a consistent length, but varies in height and width. The trinomial cube is another, more advanced sensorial work that in addition to being categorized a sensorial work, it serves as an introduction for algebra and a preparation for the proof of the formula (a+b+c)3 at Elementary Level.