Children were taught at home until about 15 years of age, but all Aztec children, boys and girls, were expected to attend school for some time when they were between 10 and 20 years old.
The calmecac, attended mostly by the sons of pillis, was focused on turning out leaders (tlatoque), priests, scholars/teachers (tlatimini), healers (tizitl) and codex painters (tlacuilos).