The Chronicles of Narnia - The Silver Chair - Pg1-40

One day Jill Pole was crying behind the gym because some kids had been bullying her. Their principle said that they were "interesting psychological cases". Then Eustace came to her and they talked. Eustace told her about Narnia. The bullies were coming back so they went inside a gate. They went to cliff and Eustace fell down. Aslan came to Jill and told her that Eustace was safe and he told her some steps she had to do. She repeated them again and again till she got them right. Then Aslan blew her into Narnia.