crib sheet; cheat sheet
A small piece of paper with notes used to cheat on an exam. Wasei-eigo from 'cunning paper'.
wasei-eigo (Japanese-coined English), from cunning paper
He was caught with a cheat sheet during the exam and was made to leave.
large cue card used in TV filming
A large sketchbook or board used on TV sets to convey stage directions, messages, or cues to the cast. This is a specialized media-industry usage.
During the variety show recording, the assistant director used a cue card to give directions to the performers.