In 1966, René Le Roy (1898-1985) and his student Claude Dorgeuille co-authored Traité de la flûte historique, technique et pedagogique. This treatise presents the culmination of Le Roy's career as a renowned performer and teacher in both Europe and North America. His approach to the study of music, as presented in the method, diverges from traditional French training, instructing teachers to compose exercises specific to the needs of the student and by using repertoire as source material. Claude Dorgeuille writes of the method, "...the Traité gives an outline analysis of the principal elements of technique, thus allowing exercises to be devised as appropriate to the needs of the individual." Using Le Roy's treatise, I demonstrate the application of his teaching to Jacques Ibert's Deux stèles orientées pour voix et flûte (1925), a work dedicated to and premiered by Le Roy, through the creation of individual exercises tailored to preparation of Ibert's work.