Urban charter schools serving economically disadvantaged minority communities experience high teacher attrition. This study examined the association between high-demand teachers, school working conditions, and turnover, both voluntary departures and involuntary terminations in an urban, charter school district. I found that improved working conditions were associated with a decrease in the odds of leaving, but this significant association only applied to departures, not terminations. Despite this effect of working conditions on turnover, working conditions did not moderate the effect of high-demand turnover in any model. Regarding high-demand teachers, I found that special educators and teachers of color were less likely to leave than non-special educators and non-teachers of color when accounting for working conditions and controlling for teacher and school characteristics. When examining departures versus terminations, teachers of color were less likely to depart from their teaching positions, and special educators were less likely to be terminated. In general, STEM teachers were more likely to leave the organization than non-STEM teachers, but this finding was not significant. [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.]