Glenn directed some 1,100 Acting for the Camera scenes while teaching in a Burbank acting class in the 1980s, where he worked with Heather Locklear, Leslie Hope, Jeff Speakman, Kimberlin Brown, Nadine Van der Velde, Tracy Bregman, Wendy Kilbourne, Kristi Ferrell, Tony Quinn, Marc Decascos, and Kato Kaelin.
