Who was an Aztec commoner?

An Aztec commoner was in the second class and the boys were taught how to fight in the war etc and the girls were taught how to care for family and how to cook. They both were taught to play instruments so that when they got older if they werent killed they would probably become a slave who could sing and dance. Children at the ages of 4-9 were normally killed because they believed to give back to the rain god there had to be tears before they ripped there hearts out. I fnot they would grow up and live life before they sacrificed themselves.