This study offers a better understanding of the reasons why parents from six different countries across the Western hemisphere chose private, non-denominational schools for their children's education. The findings deepen the knowledge in what is currently an underdeveloped field of research in education. The overarching research question was: What are the primary reasons why parents chose a private non-denominational school in Mexico, Spain, Costa Rica, United States, United Kingdom, and South Africa for their children's education? To explore this question in depth, the researcher considered five sub-questions and employed a grounded theory qualitative research design. Data were collected twofold through focus groups and individual interviews and analyzed iteratively to develop a fresh theoretical perspective on the topic of parent school choice. Extant literature explains that the most frequent reasons to choose a private school include quality of education, location, participation of parents and being able to be heard, financial resources, and parents' prior educational experiences. Contributing to the literature, this study revealed four major reasons for private school selection: consideration of private education as an investment for the future, smaller class size, the opportunity for students and their families to establish social contacts, and the academic quality of the school. In addition, three reasons specific to certain countries were identified: importance of learning the English language, quality of the facilities, and extended school day. Finally, eight additional secondary reasons were found including: international character of the school, happiness of the students in the school, distance from parents' home, quality of the environment, prestige or tradition of the school, private management and organization, values and ethos of the school, and the non-denominational nature of the school. These findings can help private--and public--school administrators make better decisions to improve the quality of their educational offerings in knowing what parents most value. Parents may also find value in understanding the factors for consideration when evaluating public versus private school options. Finally, recommendations for practice and research for the field of education are offered. [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.]