This article presents the findings from a longitudinal study of pre-service principals during their required internship. The authors investigated interns' perceived acquisition of skills to meet licensure standards using scaled scores on the Colorado Standards Knowledge (CSK) instrument and structured reflective journaling. The findings revealed interns' perceived increased knowledge of the standards and the integration of the standards throughout their internships. This indicated that requiring guided reflective journaling throughout principal internships clearly incorporated the broad knowledge outlined by the standards established for principals. (Contains 1 figure and 1 table.)