Novice teachers’ professional contexts may have important implications for their effectiveness, development, and retention. However, due to data limitations, descriptions of these contexts are often unidimensional or vague. Using 10 years of administrative data from the Los Angeles Unified School District, we describe patterns of new teacher sorting using 24 context measures organized along three dimensions—intensity of instructional responsibilities, homophily, and colleagues’ qualifications—and use school-level survey data to measure a fourth dimension. professional culture. Relative to more experienced teachers, novice teachers have placements that are more challenging along the first three dimensions, and composite measures of the dimensions are differentially predictive of teachers’ outcomes. This suggests that policymakers should carefully consider placements to better support novice teachers.

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Low-income students and students of color are faced with pervasively lower levels of opportunity to learn compared with their peers, creating unequal opportunities for educational success. Textbooks, which serve as the backbone of the curriculum in most mathematics classrooms, present a potentially powerful tool to help mitigate unequal opportunity to learn across students. Using the Surveys of Enacted Curriculum framework, we investigate the content of commonly used eighth-grade math textbooks in California and the extent to which they align with the Common Core State Standards. We also explore the relationship between the variation in content coverage and alignment and student characteristics. We find poor alignment between the textbooks in our sample and the Common Core State Standards and low overall levels of cognitive demand, but only limited evidence of systematic differences in alignment or cognitive demand coverage associated with student characteristics at the school or district level.