The central purpose of education is to allow us to understand the world we live in and to think about our personal and collective actions in order to enhance them.
Everything that is appropriate to our age and in particular viualisations and physical exercises which help us establish permanent memory.
Showing is Knowing. Adults learn most often in the form of instantaneous realisations. Adults transfer spoken or written concepts into visual memory stored in the safe vault of the subconscious, until the subconscious needs to find explanation, in new words.