1. A method of teaching a melody for a series of words to be sung, the melody and words being comprised at least in part of a series of repetitive tropes each having a predetermined tune, the method comprising: selecting a first trope in the melody and isolating each occurrence of the first trope in the melody, highlighting each occurrence of the first trope in the melody with a distinctive first color, and selecting and highlighting with a distinctive different colors each occurrence of at least one other trope in the melody so that the first and other tropes will stand out from surrounding tropes in the melody.