You should think carefully before submitting supplementary material. There are many successful applicants who submit only the items that we require. There are also cases in which mediocre submissions or too many extra items can work against a candidate.
Supplementary submissions make sense when they add important information.
If you have a particularly well-developed talent, you may send supplementary material such as a cassette tape, musical scores, slides, or writing samples. Please note that we do not evaluate videotapes. All supplementary materials must be clearly labeled with your name, school, and state, as well as the instrument, medium, etc. Please see the sections below for information about the submission of art or music supplements. If you are thinking about submitting extra writing samples, you might consider sending a few carefully chosen short pieces rather than a long manuscript.