You just joined a new school. It's a magic school. As soon as you went through the door you got a spellbook. It consists of many pages and many chapters, such as Basic magic (chapter 1), and it even goes up to dark magic (chapter 82, requires passkey to open). You go and find your seat. Soon the teacher comes.

Teacher: "It's nice to see new faces in this school. Now that you all have turned ten, you are ready to start learning."