Teachers have long struggled with the tension between ensuring a rigorous education for all their students and the reality that students arrive at the start of a school year with vastly different skills and conceptual understandings. The tension can be even more acute in math, which relies heavily on students mastering foundational concepts in…

The move toward assessments that measure student growth, rather than just proficiency, has been perceived as an improvement in state accountability systems. However, Michael Watson explains that, for many students, these measures present an incomplete picture. Because they are based on grade-level assessments, any growth achieved by students who…