In 2002, President George W. Bush signed into law the No Child Left Behind Act (NCLB), which is intended to ensure that each classroom has a highly qualified teacher. Current research, however, shows approximately 27% of teachers hired each year leave the profession; in addition, approximately 50% of teachers with less than five years experience either leave the profession or transfer to another school. This qualitative phenomenological study was conducted in a public school district to explore the reasons teachers resign from their teaching positions. This research explored teachers' perceived reasons for leaving using Herzberg's motivation-hygiene theory and other studies on job satisfaction and teacher efficacy as the theoretical foundations. Research questions examined why teachers voluntarily leave the teaching profession and what factors influence teacher job satisfaction. The seven former teachers participating in this study taught in schools with lower-achieving, highly transient populations. Data were collected through in-depth interviews of these teachers and analyzed through the use of epoch, reduction, and synthesis of the meaning units in the interview texts that reflected the teachers' lived experiences. The themes emerging from this study focused on administrative support, and they aligned with similar themes found in the literature indicating that teacher attrition is typically greater in lower socio-economic schools where closing the achievement gap is vital to meeting the goals of NCLB. The potential impact of this study on social change includes an understanding of teacher attrition by providing insights for retaining highly qualified teachers and improving job satisfaction, especially in the lower-achieving schools where improving student achievement is a critical concern. [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/en-US/products/dissertations/individuals.shtml.]