The teens as teachers model is a promising approach to impact teen behavior. The current study evaluated dietary knowledge and behavior among teen teachers participating in a 4-H youth development program (N = 46; M[subscript age] = 15.5 years; 67% female; 48% Hispanic; 38% White Non-Hispanic, 14% Other). A paired sample t test was conducted on pre- and post-program surveys to identify significant improvements in dietary knowledge and behaviors. Findings suggest teens as teachers is generally effective in promoting healthy dietary knowledge and behavior. We recommend this approach be disseminated within Extension 4-H youth development healthy eating active living programming.