Vennard was renowned as an excellent teacher whose written works have influenced generations of singers, vocal pedagogues and voice scientists.
Vennard spent the next several years teaching part-time simultaneously at the Chicago Evangelistic Institute, DePaul University and the American Conservatory.
[3] As a singer, Vennard was active in opera, oratorio and solo song; as a teacher of singing, many of his students achieved worldwide success.
Winning several awards, including best medical research film from a festival in Prague in 1960, it shows the anatomy and physiology of voice production in the excised larynx.
In 2018, a symposium called The Art and Science of Great Teaching: Celebrating the Legacy of William Vennard was held at the University of Southern California's Doheny Memorial Library featuring presentations by Thomas Cleveland, Scott McCoy, Stephen F. Austin, Kari Ragan, Kenneth Bozeman, Lynn Helding, and Cindy Dewey;[11] these are slated to be published by Inside View Press.