The current supply of science, technology, engineering, and mathematics (STEM) teachers in the teacher labor market is not meeting the demand required by schools and districts needing highly qualified STEM teachers to fill vacancies. The study in this policy brief addresses the potential factors contributing to math and science teacher turnover to better understand and address the needs of educators for long-term retention. As potential levers of turnover, the authors examined prior and post labor markets for science and math teachers, the urbanicity of teaching environments, differences across time by teacher cohorts, and teacher preparation pathways. As a result, they uncovered several key takeaways that could inform future policy.