The reason why he wants to become a teacher because he wants to teach children with the knowledge and skill to learn, meet friends, and finally have a knowledge gap.
The reason I became a teacher because I have the knowledge to teach children skills to public undertakings in the various studies have found friends were finally have some knowledge of ourselves.
Why you want to be a teacher because I want to teach children with the knowledge and skills to study in various public, friends, and finally got to know you ourselves.