Although wide variation in teacher effectiveness is well established, much less is known about differences in teacher improvement over time. We document that average returns to teaching experience mask large variation across individual teachers and across groups of teachers working in different schools. We examine the role of school context in explaining these differences using a measure of the professional environment constructed from teachers responses to state-wide surveys. Our analyses show that teachers working in more supportive professional environments improve their effectiveness more over time than teachers working in less supportive contexts. On average, teachers working in schools at the 75th percentile of professional environment ratings improved 38% more than teachers in schools at the 25th percentile after 10 years.

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Background/Context Educational policy makers have begun to recognize the challenges posed by teacher turnover. Schools and students pay a price when new teachers leave the profession after only 2 or 3 years, just when they have acquired valuable teaching experience. Persistent turnover also disrupts efforts to build a strong organizational culture and to sustain coordinated instructional programs throughout the school. Retaining effective teachers is a particular challenge for schools that serve high proportions of low-income and minority students. Although some interpret these turnover patterns as evidence of teachers’ discontent with their students, recent large-scale quantitative studies provide evidence that teachers choose to leave schools with poor work environments and that these conditions are most common in schools that minority and low-income students typically attend. Thus, mounting evidence suggests that the seeming relationship between student demographics and teacher turnover is driven not by teachers’ responses to their students, but by the conditions in which they must teach and their students are obliged to learn. Purpose/Objective/Research Question/Focus of Study We build on this body of work by further examining how working conditions predict both teachers’ job satisfaction and their career plans. We use a broad conception of the context of teachers’ work, paying attention not only to narrowly defined working conditions but also to the interpersonal and organizational contexts in which teachers work. We also extend Ladd's analysis describing the relationship between the work context and student achievement. Advancing our understanding of this relationship is particularly important, given the increasing emphasis legislators place on evidence of student achievement when evaluating education policy. Specifically, we ask three research questions: (1) Do the conditions of work in Massachusetts public schools affect teachers’ satisfaction with their jobs and their career plans? (2) Are schools with better conditions of work more successful in raising student performance than schools with less supportive working conditions? (3) If the conditions of work are important, what elements of the work environment matter the most? Research Design In this article, we combine a statewide survey of school working conditions (MassTeLLS) with demographic and student achievement data from Massachusetts. We examine three primary outcomes: teacher satisfaction, teacher career intentions, and student achievement growth. From different items on the MassTeLLS, we construct a set of nine key elements that reflect the broad-based conditions in which teachers work. We fit standard regression models that describe the relationship between each outcome and both overall conditions of work and each element separately, modeling this relationship according to the properties of our outcome variables. Findings/Results We found that measures of the school environment explain away much of the apparent relationship between teacher satisfaction and student demographic characteristics. The conditions in which teachers work matter a great deal to them and, ultimately, to their students. Teachers are more satisfied and plan to stay longer in schools that have a positive work context, independent of the school's student demographic characteristics. Furthermore, although a wide range of working conditions matter to teachers, the specific elements of the work environment that matter the most to teachers are not narrowly conceived working conditions such as clean and well-maintained facilities or access to modern instructional technology. Instead, it is the social conditions—the school's culture, the principal's leadership, and relationships among colleagues—that predominate in predicting teachers’ job satisfaction and career plans. More important, providing a supportive context in which teachers can work appears to contribute to improved student achievement. We found that favorable conditions of work predict higher rates of student academic growth, even when we compare schools serving demographically similar groups of students. Conclusions/Recommendations In short, we found that the conditions of teachers’ work matter a great deal. These results align with a growing body of work examining the organizational characteristics of the schools in which teachers work. Together, these studies suggest strongly that the high turnover rates of teachers in schools with substantial populations of low-income and minority students are driven largely by teachers fleeing the dysfunctional and unsupportive work environments in the schools to which low-income and minority students are most likely to be assigned. If public education is to provide effective teachers for all students, then the schools those students attend must become places that support effective teaching and learning across all classrooms.