TY - JOUR AB - Teacher evaluations should reflect teaching performance rather than the characteristics of the students assigned to a teacher. Exploiting naturally occurring year-to-year variation in classroom composition within teachers, this paper examines whether teacher performance ratings assigned by evaluators and students are influenced by classroom context. We find that teachers with higher-achieving and less disruptive students, holding constant the teacher and school, receive systematically higher performance ratings. These effects are robust across model specifications, placebo tests, and multiple dimensions of teaching practice, whereas classroom demographics show no consistent association with ratings. A policy that adjusts evaluator scores for classroom characteristics, analogous to value-added models, increases the relative ranking of Black teachers by 8 percentage points, highlighting equity impacts of considering classroom context. AU - Delgado, William AU - Sartain, Lauren PY - 2026 ST - Classroom Composition Affects Teacher Performance Ratings TI - Classroom Composition Affects Teacher Performance Ratings UR - http://www.edworkingpapers.com/ai26-1395 ER -