I remember in high school having to diagram sentences. Idiotic sentences assembled in impromptu fashion were written on the board. Then our task was to diagram these bastards as a quiz.

Well, I have yet to actually do that in the real world. In fact, I see no point in diagramming sentences. It was the biggest waste of time and probably the most boring thing I had ever done in school.

So, what are some things you had to study in school that you have yet to use in the real world?