Since the nineteenth century the Two Part Inventions have become standard repertoire for piano students. However, piano teachers have often failed to give serious consideration to the suitable selection of Inventions for study. Piano students have commonly formed a dislike for Bach's piano music because of an ungratifying initial experience. There is little material written in English dealing with the Two Part Inventions. Those studies of the Inventions which do exist consist mainly of brief articles in periodicals and limited discussions in piano literature books. Therefore, there seemed to be a need for a systematic collection of pedagogical ideas concerning the Two Part Inventions. In addition, it was felt that an analysis of the problems in each piece and a subsequent graded list of the Inventions would be a step toward a more intelligent and more knowledgeable approach in the teaching of these compositions.