The purpose of the study was to compare and contrast influences principals have on staffing, curriculum issues, and discipline policies in high- and low-performing urban high schools. The data for the present study were drawn from the first year follow up of the Educational Longitudinal Survey of 2002-2004 (ELS: 02), administered by the National Center for Educational Statistics. Of the 14,000 school administrators surveyed, only high-and low-performing urban high schools were included for this study. The results of this study revealed four areas where principals differed in their perceptions of their individual influences on academic achievement at their respective schools. Principals from high achieving urban school tend to have more influence on hiring and firing teaching staff and curriculum issues, such as course offerings and curricular guidelines. Principals from low achieving schools have more influence on school funding. (Contains 3 tables.)