One day, at the school yard...

A blonde gets a job as a substitute physical education teacher of high school freshmen.

She notices a boy at the end of the field standing alone, while all the other kids are running around having fun kicking a ball.
She takes pity on him and decides to speak to him.
 

She asks, “Are you okay, sweetie?” 
 


The kid responds, “Yeah, I’m fine.”

“You know, you can go and play with the other kids…”

“It’s best I stay here.” 


“Why’s that sweetie?”

The boy looks at her incredulously and says, “Because I’m the Goalie!”