Abby walked into the classroom and saw a substitute sitting at the teacher's desk. She hated subs. Abby took her seat and the teacher started to talk. The sub said that before the class learns anything, he wanted to open the kids imagination. He told them a story about how the sub got there...
"The way I got here was by my submarine. It was a big submarine. But I didn't like that, so I decided to go on the subway. The subway went all the way down to the bottom of the earth, so I saw lava and rocks. When I saw the sun again, it was in the play yard here."
The fantasy was over and the sub wrote what the class needed to learns today on the broad.