Although the Aztecs knew a type of hieroglyphic writing, the transmission of their culture was carried out mainly orally. The education was imparted in two institutions, the telpohcalli, for the commoners, and the calmécac, for the nobles. The Aztecs stood out for the development of sciences such as astronomy and mathematics, where they even developed a vigesimal number system. Aztec empire. Tenochtitlan. Peoples of Mesoamerica