Teacher retention is an institutional problem that adversely affects student achievement and is a factor in learning gaps. Teacher retention in the United States validates universal education industry stability. Sonmez Cakir and Adiguzel (2020) asserted that leadership effectiveness develops top-ranking commitment and employee encouragement during teacher retention. This research study aimed to identify school leadership behaviors that may influence teachers' organizational commitment and retention. The study sought to unearth the importance leaders place on leader behavior. Many models and theories seek to characterize leader behavior. In addition, the study intended to highlight the impact of leader efficacy with leader behavior on changing organizational commitment and the most effective teacher retention strategies. The research grounded on the path-goal theory used a qualitative study method to seek a better understanding of the teacher retention phenomenon (Northouse, 2022). The following three research questions led the study to provide an in-depth account of the problem: (1) What importance, if any, do school leaders place on organizational commitment? (2) What are the impacts of using leadership behavior to encourage organizational commitment within K-12 schools? (3) What specific leadership behaviors are perceived as most effective in encouraging teacher retention in K-12 schools? Experienced school leaders in the United States participated in the study, each using leader behavior for at least two years to change organizational commitment and teacher retention. The researcher gathered information regarding school leaders' perceptions through qualitative semi-structured email surveys. Using leader behavior to change organizational commitment is relevant in education because it may reveal supportive leadership practices that provide extensive teacher commitment and retention. [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.]