Rich, Jamie, Dennis W. Duncan, Maria Navarro, and John C. Ricketts. “Examining Differences in Middle School Student Achievement on a Criterion-Referenced Competency Test (CRCT) in Science”. Journal of Agricultural Education 50, no. 4 (December 31, 2009): 14–24. Accessed July 14, 2024. https://jae-online.org/index.php/jae/article/view/1293.