Aztec social structure

the Aztec social structure was far more advanced than the Inca. 

Aztecs: 
the Aztecs made their children go to school it was a mandatory requirement. The Aztec social structure was very organized. They followed   a Hierarchy.. The Aztecs had 5 main social classes.  
ruler and family
nobles
commoners
peasants 
slaves

Incas: 
there was no requirement of schooling for children. was not as organized.
there were also 5 major social classes
king/high priest 
council and royal family
nobles
merchants and artisans
commoners/farmers slaves