Continued development and delivery of animal science programs for 4-H youths is a critical need in all livestock production regions. The large number of 4-H youth programs, their rural locations, and the small number of 4-H Extension professionals make delivery of new curricula challenging. In response, we developed animal science lessons for volunteer leaders. We evaluated the effectiveness of a quality assurance lesson delivered by untrained volunteers on learning among 4-H youths in 32 clubs across Idaho. Survey results indicate improved student learning and provide preliminary evidence that this delivery model can be effective for 4-H participants.