In this article, we describe findings from an analysis of the relationship between scores on a standards-based teacher evaluation system modeled on the Framework for Teaching (Danielson, 1996) and student achievement measures in a large Western school district. We apply multilevel statistical modeling to study the relationship between the evaluation scores and state and district tests of reading, mathematics, and a composite measure of reading and mathematics. Using a value-added framework, the teacher evaluation scores were included at the 2nd level, or teacher level, of the model when other student and teacher-level characteristics were controlled. This study provided some initial evidence of a positive association between teacher performance, as measured by the evaluation system, and student achievement. The coefficients representing the effects of teacher performance on student achievement were positive and were statistically significant in 4 of 9 grade-test combinations studied.