Teacher: A long time ago people thought there were only four elements. Can anyone guess what they were?
Me: Water. Earth. Fire. Air. Long ago, the four nations lived together in harmony. Then everything changed when the Fire Nation attacked. Only the Avatar, master of all four elements, could stop them, but when the world needed him most, he vanished.
English teachers put way more thought into books than the actual authors did.
Teacher: Oh look, there is a raven mentioned. THIS MUST SYMBOLISE DEATH AND HER DESIRE TO FLY AWAY FROM HER LIFE, WHICH IS A FOREBODING FOR HER LATER LEAVING HER VILLAGE!