Over the last few months, media outlets including Axios, CNN, The New York Times, and The Wall Street Journal have raised the specter that there may be a rise in teachers exiting the profession. The concern is that a post-pandemic private sector boom, combined with relatively low teacher pay and burnout from online teaching, are a combustible mix that will lead to sharply higher teacher attrition. This in turn could leave schools scrambling to address a teacher "shortage" at the very time they are trying to help students recover from the COVID pandemic. But, so far at least, data from a number of states and large cities suggest that fewer teachers left the profession in 2020 than in normal years. This brief uses data from more than three decades of administrative data on the entire teaching workforce in Washington state to analyze the degree to which variation in teacher turnover for individual schools and school types relative to variation over time that may be connected to economic conditions is observed. The authors examine two reasons that teachers leave their (public) school teaching positions: (1) "mobility," which tracks teachers who leave one public school, but end up employed in a teaching position in another (Washington) public school; and (2) "attrition," which tracks teachers who leave public school teaching in Washington entirely. The focus is on both of these types of turnover because both are connected to the ability of individual schools and districts to staff their classrooms, and prior work has connected both attrition and mobility to the characteristics of schools and districts.