These are the children who, in a short space of time, sometimes in a few days, learn to write and to perform the first operations of arithmetic. It is not a fact that children in general can do it, as many have believed. It is not a case of giving my material for writing to unprepared children and of awaiting the "miracle."

The fact is that the minds and hands of our children are already _prepared_ for writing, and ideas of quantity, of identity, of differences, and of gradation, which form the bases of all calculation, have been maturing for a long time in them.

Dr. Montessori's Own Handbook — Part 41

One might say that all their previous education is a preparation for the first stages of essential culture--_writing_, _reading_, _and number_, and that knowledge comes as an easy, spontaneous, and logical consequence of the preparation--that it is in fact its natural _conclusion_.

Dr. Montessori's Own Handbook — Part 41

We have already seen that the purpose of the _word_ is to fix ideas and to facilitate the elementary comprehension of _things_. In the same way writing and arithmetic now fix the complex inner acquisitions of the mind, which proceeds henceforward continually to enrich itself by fresh observations.

Dr. Montessori's Own Handbook — Part 41

Our children have long been preparing the hand for writing. Throughout all the sensory exercises the hand, whilst cooperating with the mind in its attainments and in its work of formation, was preparing its own future. When the hand learned to hold itself lightly suspended over a horizontal surface in order to touch rough and smooth, when it took the cylinders of the solid insets and placed them in their apertures, when with two fingers it touched the outlines of the geometrical forms, it was coordinating movements, and the child is now ready--almost impatient to use them in the fascinating "synthesis" of writing.

The _direct_ preparation for writing also consists in exercises of the movements of the hand. There are two series of exercises, very different from one another. I have analyzed the movements which are connected with writing, and I prepare them separately one from the other. When we write, we perform a movement for the _management_ of the instrument of writing, a movement which generally acquires an individual character, so that a person's handwriting can be recognized, and, in certain medical cases, changes in the nervous system can be traced by the corresponding alterations in the handwriting. In fact, it is from the handwriting that specialists in that subject would interpret the _moral character_ of individuals.