The purpose of this qualitative case study was to examine perceptions of factors that foreign language teachers, who have at least five years of teaching experience, identify as having improved or hindered their self-efficacy and highlight what contributed to their retention in the teaching field. Understanding these factors is essential to training new and novice teachers and improving retention. The foundational framework used for this study was Bandura's social cognitive theory, at the heart of which is the construct of self-efficacy and the belief in a person's ability to achieve specific tasks. The social cognitive theory explains that human behavior, considering the phenomenon of reciprocal causation, informs how both the individual and the environment affect each other. Themes that emerged from the research questions showed that teachers' perceptions of their self-efficacy affect their decision to stay in the job. A sample of 15 teacher participants' (with high self-efficacy) shared experiences regarding their perception of self-efficacy in relation to burnout and staying in the teaching position. Data were collected via a survey, individual interviews, and a focus group. Findings show numerous factors that enhance teachers' self-efficacy, focusing on Bandura's four principal sources of information which include the following: enactive mastery experiences, vicarious experiences, verbal persuasion, and physiological and affective states. Organizations should invest in (a) a welcoming package and building a sense of community, (b) a tailored professional development program for teachers and supervisors, (c) a formal mentoring program (ensuring teachers master their materials and gain confidence in their ability to teach), (d) team building and colleagues' cooperation, and (e) administrative support. Developing new and novice teachers' self-efficacy early in their career boosts their commitment to the organization, improves job satisfaction, and helps them cope with stress and stay in the profession. [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://www.proquest.com.bibliotheek.ehb.be/en-US/products/dissertations/individuals.shtml.]