The purpose of this research was to study and analyze factors affecting the development of schools and how this development is reflected in the Quality of the teachers' lives from different schools affiliated to municipalities of Thailand. The study was conducted among 400 teachers from 16 schools located in different districts and affiliated to different municipalities in Thailand. General data were analyzed with descriptive statistics in terms of percentage, mean, standard deviation, minimum score, and maximum score. Analytical statistics were used to analyze factors in order to study about the development of school and multiple regression analysis was used for testing relationship between each factor to the development of schools, and also in regard to how each factor is related to the Quality of the teachers' lives. The qualitative data was then used to supplement the quantitative data collected.
