What great ideas have the Aztecs come up with?

Many things can be attributed to this people, for example:

Those who invented chocolate were the Aztecs, the product was improved by European peoples. This was one of the great apprenticeships with this ancient civilization. The Aztecs were one of the first societies to develop a compulsory educational system for your population. They were great scholars of the stars and mathematics. It is no wonder that even for the European societies of the time, some of its technologies were quite advanced. An example is its calendar similar to ours, which had 365 days.