Testing and accountability measures have continued to expand since the passage of the No Child Left Behind Act in 2001. In addition to school and district accountability, student test scores increasingly formed the foundation of teacher performance metrics. State participation rates exceeded the 95% minimum prescribed by law despite increasing…

With states and districts across the country implementing the Common Core State Standards, teachers have more opportunities than ever to collaborate around the shared goals of strengthening curriculum design, classroom practices, and student learning. Building from this premise, the Common Assignment Study (CAS) has brought together teams of…