Why do we teach?

There are many reasons why the collective 'we' choses to teach. When taking notes on different philosophers I liked some of the things that Rousseau said. He talked about how education impacted society and the people in it, saying that a properly educated person would be engaged in society as well as relate to thier fellow citizens in a natural way. By teaching self-worth and morality a student can learn how to act in a virtuous way even though society itself isn't perfect. But how arethey going to know what the correct actions are? Teach them what is right and what is wrong? Give them education? Teach them self worth? That is the job of the teacher. That's one reason why we teach.