In response to an increasing emphasis on instructional leadership and school achievement, the School Administration Manager (SAM) model was introduced as a change strategy to release principals from managerial responsibilities so that more time can be devoted to instructional leadership. The study collected and analyzed survey and focus group interview data to evaluate the impact of SAMs on principals' management and instructional leadership. In addition, the study examined if school level (elementary or middle school) affects the impact of SAMs. Results illustrate SAMs have a positive impact on management and instructional leadership and the impact was stronger at the middle school level.