Most states have developed or revised school accountability systems in response to the Every Student Succeeds Act (ESSA). While these systems include multiple indicators, to many stakeholders the outcome of central interest is the overall rating or classification produced for each school. These ratings are often used to identify schools that merit…

This "Practitioner's Guide to Growth Models," commissioned by the Technical Issues in Large-Scale Assessment (TILSA) and Accountability Systems & Reporting (ASR), collaboratives of the "Council of Chief State School Officers," describes different ways to calculate student academic growth and to make judgments about the…