How would you introduce their parents to the classroom behavior management plan?

You can do that by sending information to the parents about all the classroom rules and regulations the dos and dont's and also an explanation as to why the child has to follow these rules maybe through a mail or a letter to the parent

it depends on which society you are referring to. many civilization performed rituals so the gods would with their growing season but the most well known is that of the aztecs. they would make sacrifices, usually animals, but sometimes humans as well.