Recently, educational researchers and practitioners have turned to value-added models to evaluate teacher performance. Although value-added estimates depend on the assessment used to measure student achievement, the importance of outcome selection has received scant attention in the literature. Using data from a large, urban school district, I…

The practice of analyzing all available project children in as large a group as possible is considered not to be justifiable when distinct subgroups of pupils are represented. Instead, the approach suggested here determines the test score gain a pupil achieves from the beginning to the end of the year, with all of the pupil gain scores of a single…

At the heart of the No Child Left Behind Act (NCLB) is the call for all students to be "proficient" in reading and mathematics by 2014. Yet the law expects each state to define proficiency as it sees fit and design its own tests. This study investigated three research questions related to this policy: (1) How consistent are various…