A teenage programmer finds out how to use abstraction in programming. She gives instructions to her "computer", a human figure with a monitor for a head. She asks him to let people in for a dance audition, only choosing those who can dance and want to dance. Because she doesn't specify in her code that the dancers have to be human, an enthusiastic little dog is among those selected to audition. Abstraction means telling a computer what information is important and what isn't. Teacher notes: Discuss other situations and abstract the main parts, e.g., look at games (board or computer) and abstract the main parts.