XI. Rhythm in Education

If we look again at the three most important phases of elementary school, then we see that they are: first, from entering elementary school at about the age of six or seven until the age of nine; then second, from the age of nine until about the age of twelve; and finally from twelve until puberty. The capacity to reason independently only begins to occur when people have reached sexual maturity, even though a kind of preparation for this capacity begins around the age of twelve. For this reason, the third phase of elementary school begins about the age of twelve.