Singing Lessons with Master Singing Teacher and Vocal Coach Nancy D'Agostino. With over 27 years of teaching experience. First the White Diamonds School of Modern Singing and Music Management, then the Institute of Performing Arts and currently with the Institute of Singing. learn Vocalology Developed by Nancy to help singers Master the Vice with practical technique that gets results. Prepare for Auditions, performance stagecraft, songwriting and artist development and more.