Skills, productivity and the evaluation of teacher performance.

Highlights: [•] We compare principals’ evaluations of teachers with value-added measures of teacher performance. [•] Principals can distinguish between high and low-value added teachers, but the overall correlation between principal evaluations and value added is modest. [•] Principal evaluations capture a different set of personality traits than do value-added measures. [•] Past value-added predicts a teacher's impact on student achievement, though in some cases subjective ratings can improve predictive ability. [Copyright &y& Elsevier]