Student assessment nonparticipation (or opt out) has increased substantially in K-12 schools in states across the country. This increase in opt out has the potential to impact achievement and growth (or value-added) measures used for educator and institutional accountability. In this simulation study, we investigated the extent to which…

During the late 1990s and 2000s, the State of Florida enacted a set of education reforms spearheaded by Governor Jeb Bush. These policies, which emphasize test-based accountability, competition, and choice, have since become known as the "Florida Formula for education success," or, simply, the "Florida Formula." In recent…

If teacher value-added estimates (VAEs) are to be used as indicators of individual teacher performance in teacher evaluation and accountability systems, it is important to understand how much VAEs are affected by the data and model specifications used to estimate them. In this study we explored the effects of three conditions on the stability of…