During the opening credits of many episodes of
The Simpsons, Bart Simpson writes a unique phrase on the chalkboard. This
is known as the
chalkboard gag. In the early days of the series, a gag
was used in almost every episode, but, as commercial time has increased, they
have gradually disappeared. They are now shown as rarely as twice per season.
The show's producers have said that they may soon sadly disappear altogether.