The purpose of this quantitative, predictive correlational study was to examine if a predictive relationship existed between teachers' sense of efficacy and the dimensions of instructional leadership considered both collectively and individually, among K-12 teachers in North Carolina. The Instructional Leadership Model and Tschannen-Moran and Woolfolk Hoy's formation of teacher Self-Efficacy provided the foundation for the study. A convenience sample of 145 K-12 teachers with at least three years of experience responded, however, the final sample size was 90 participants who completed the survey entirely. There were optional demographic questions. Participants were recruited through a school district and via Facebook. The overarching question asked, to what extent does a predictive relationship exist between teachers' sense of efficacy as measured by the Teachers' Sense of Efficacy Survey Short Form (TSES) and instructional leadership (which includes three dimensions) as measured by the Principal's Instructional Management Rating Scale Teacher Short Version (PIMRS). Three hypotheses were associated with the three dimensions of instructional leadership: defining the school's mission, managing the instructional curriculum, and promoting a positive learning climate. Results of the linear regression model predicting teacher's self-efficacy based on PIMRS collectively were significant, F (3,86) = 21.062, p < 0.001, R[superscript 2] = 0.42. The predictive model for defining the school's mission on self-efficacy and managing instruction was statistically significant, (B = 0.71, t (100) = 2.89, p = 0.005) and (B = 0.80, t (100) = 2.35, p = 0.02), respectively. Based on the findings and prior research, school administrators should receive professional development for instructional leadership to improve teacher's efficacy. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]